View Filing Data

Accounts receivable (net of allowance for doubtful accounts of RMB2,121 and RMB341 (US$55) as of December 31, 2011 and 2012, respectively)

30,781

191,766

4,578

47,089

293,369

147,624

Short-term investments

35,746

222,701

894,540

Prepaid expenses and other current assets

15,370

95,756

47,575

Deferred tax assets

1,378

8,585

4,872

Amounts due from related parties

3,006

18,726

41,643

Total current assets

202,752

1,263,157

1,551,221

Non-current assets:

Property and equipment, net

132,054

822,707

453,883

Intangible assets, net

48,781

303,909

159,439

Goodwill

47,622

296,688

217,436

Short-term bank borrowings (including short-term bank borrowings of the Consolidated VIE without recourse to 21Vianet Group, Inc. of RMB100,000 and RMB176,961 (US$28,404) as of December 31, 2011 and 2012, respectively)

35,574

221,628

Deferred tax assets

1,803

11,231

12,773

Long-term investments

9,245

57,599

8,200

Total non-current assets

275,079

1,713,762

851,731

Total assets

477,831

2,976,919

2,402,952

Current liabilities:

28,404

176,961

100,000

Accounts payable (including accounts payable of the Consolidated VIE without recourse to 21Vianet Group, Inc. of RMB82,008 and RMB108,860 (US$17,473) as of December 31, 2011 and 2012, respectively)

17,587

109,571

82,131

Notes payable (including notes payable of the Consolidated VIE without recourse to 21Vianet Group, Inc. of RMB4,578 and nil as of December 31, 2011 and 2012, respectively)

4,578

Accrued expenses and other payables (including accrued expenses and other payables of the Consolidated VIE without recourse to 21Vianet Group, Inc. of RMB96,189 and RMB124,885 (US$20,045) as of December 31, 2011 and 2012, respectively)

26,890

167,498

124,326

Advances from customers (including advances from customers of the Consolidated VIE without recourse to 21Vianet Group, Inc. of RMB23,238 and RMB22,976 (US$3,688) as of December 31, 2011 and 2012, respectively)

3,688

22,976

23,238

Income taxes payable (including income taxes payable of the Consolidated VIE without recourse to 21Vianet Group, Inc. of RMB5,634 and RMB23,503 (US$3,772) as of December 31, 2011 and 2012, respectively)

3,773

23,506

5,634

Amounts due to related parties-current (including amounts due to related parties-current of the Consolidated VIE without recourse to 21Vianet Group, Inc. of RMB96,618 and RMB88,162 (US$14,151) as of December 31, 2011 and 2012, respectively)

16,860

105,037

96,618

Current portion of long term bank borrowings (including current portion of long term bank borrowings of the Consolidated VIE without recourse to 21Vianet Group, Inc. of nil and nil as of December 31, 2011 and 2012, respectively)

26,946

167,879

Current portion of capital lease obligations (including current portion of capital lease obligations of the Consolidated VIE without recourse to 21Vianet Group, Inc. of RMB26,012 and RMB36,719 (US$5,894) as of December 31, 2011 and 2012, respectively)

5,894

36,719

26,012

Total current liabilities

130,042

810,147

462,537

Non-current liabilities:

Amounts due to related parties-non-current (including amounts due to related parties-non-current of the Consolidated VIE without recourse to 21Vianet Group, Inc. of RMB124,493 and RMB50,715 (US$8,140) as of December 31, 2011 and 2012, respectively)

13,855

86,316

124,493

Long-term borrowings (including long-term borrowings of the Consolidated VIE without recourse to 21Vianet Group, Inc. of nil and nil as of December 31, 2011 and 2012, respectively)

10,112

63,000

Non-current portion of capital lease obligations (including non-current portion of capital lease obligations of the Consolidated VIE without recourse to 21Vianet Group, Inc. of RMB73,896 and RMB52,352 (US$8,403) as of December 31, 2011 and 2012, respectively)

8,403

52,352

73,896

Unrecognized tax benefits (including unrecognized tax benefits of the Consolidated VIE without recourse to 21Vianet Group, Inc. of RMB26,712 and RMB12,340 (US$1,981) as of December 31, 2011 and 2012, respectively)

1,981

12,340

26,801

Deferred tax liabilities (including deferred tax liabilities of the Consolidated VIE without recourse to 21Vianet Group, Inc. of RMB39,682 and RMB41,712 (US$6,695) as of December 31, 2011 and 2012, respectively)

7,169

44,666

39,682

Deferred government grants (including deferred government grants of the Consolidated VIE without recourse to 21Vianet Group, Inc. of RMB5,819 and RMB18,793 (US$3,016) as of December 31, 2011 and 2012, respectively)

3,016

18,793

5,819

Total non-current liabilities

44,536

277,467

270,691

Total liabilities

174,578

1,087,614

733,228

Commitments and contingencies

Shareholders' equity:

Additional paid-in capital

528,861

3,294,855

3,277,658

Accumulated other comprehensive loss

(9,208)

(57,367)

(54,779)

Statutory reserves

4,153

25,871

15,837

Accumulated deficit

(220,204)

(1,371,877)

(1,418,167)

Treasury stock

(3,323)

(20,702)

(168,018)

Total 21Vianet Group, Inc. shareholders' equity

300,283

1,870,803

1,652,554

Non-controlling interest

2,970

18,502

17,170

Total shareholders' equity

303,253

1,889,305

1,669,724

Total liabilities and shareholders' equity

477,831

2,976,919

2,402,952

Class A Ordinary Shares

Shareholders' equity:

Ordinary shares

Class B Ordinary Shares

Shareholders' equity:

Ordinary shares

$ 1

¥ 4

¥ 10

[1]	As of December 31, 2012, besides these cash and cash equivalents, the Company also holds fixed rate time deposits with maturities greater than three months of RMB222,701 (US$35,746).

CONSOLIDATED BALANCE SHEETS (Parenthetical) ¥ in Thousands, $ in Thousands	Dec. 31, 2012 USD ($) $ / shares shares	Dec. 31, 2012 CNY (¥) ¥ / shares shares	Dec. 31, 2011 CNY (¥) ¥ / shares shares
Accounts receivable, allowance for doubtful accounts	$ 55	¥ 341	¥ 2,121
Short-term bank borrowings of the Consolidated VIE without recourse to 21Vianet Group, Inc.	28,404	176,961	100,000
Accounts payable of the Consolidated VIE without recourse to 21Vianet Group, Inc.	17,587	109,571	82,131
Notes payable of the Consolidated VIE without recourse to 21Vianet Group, Inc. \| ¥			4,578
Accrued expenses and other payables of the Consolidated VIE without recourse to 21Vianet Group, Inc.	26,890	167,498	124,326
Advance from customers of the Consolidated VIE without recourse to 21Vianet Group, Inc.	3,688	22,976	23,238
Income tax payables of the Consolidated VIE without recourse to 21Vianet Group, Inc.	3,773	23,506	5,634
Amount due to related parties of the Consolidated VIE without recourse to 21Vianet Group, Inc.	16,860	105,037	96,618
Current portion of long term bank borrowing of the Consolidated VIE without recourse to 21 Vianet Group, Inc.	26,946	167,879
Current portion of capital lease obligations of the Consolidated VIE without recourse to 21Vianet Group, Inc.	5,894	36,719	26,012
Amount due to related parties non-current of the Consolidated VIE without recourse to 21Vianet Group, Inc.	13,855	86,316	124,493
Long term bank borrowings of the Consolidated VIE without recourse to 21 Vianet Group, Inc.	10,112	63,000
Non-current portion of capital lease obligations of the Consolidated VIE without recourse to 21Vianet Group, Inc.	8,403	52,352	73,896
Unrecognized tax benefits of the Consolidated VIE without recourse to 21Vianet Group, Inc.	1,981	12,340	26,801
Deferred tax liabilities of the Consolidated VIE without recourse to 21Vianet Group, Inc.	7,169	44,666	39,682
Deferred government grants of the Consolidated VIE without recourse to 21Vianet Group, Inc.	3,016	18,793	5,819
Variable Interest Entity, Primary Beneficiary
Short-term bank borrowings of the Consolidated VIE without recourse to 21Vianet Group, Inc.	28,404	176,961	100,000
Accounts payable of the Consolidated VIE without recourse to 21Vianet Group, Inc.	17,473	108,860	82,008
Notes payable of the Consolidated VIE without recourse to 21Vianet Group, Inc. \| ¥			4,578
Accrued expenses and other payables of the Consolidated VIE without recourse to 21Vianet Group, Inc.	20,045	124,885	96,189
Advance from customers of the Consolidated VIE without recourse to 21Vianet Group, Inc.	3,688	22,976	23,238
Income tax payables of the Consolidated VIE without recourse to 21Vianet Group, Inc.	3,772	23,503	5,634
Amount due to related parties of the Consolidated VIE without recourse to 21Vianet Group, Inc.	14,151	88,162	96,618
Current portion of capital lease obligations of the Consolidated VIE without recourse to 21Vianet Group, Inc.	5,894	36,719	26,012
Amount due to related parties non-current of the Consolidated VIE without recourse to 21Vianet Group, Inc.	8,140	50,715	124,493
Non-current portion of capital lease obligations of the Consolidated VIE without recourse to 21Vianet Group, Inc.	8,403	52,352	73,896
Unrecognized tax benefits of the Consolidated VIE without recourse to 21Vianet Group, Inc.	1,981	12,340	26,712
Deferred tax liabilities of the Consolidated VIE without recourse to 21Vianet Group, Inc.	6,695	41,712	39,682
Deferred government grants of the Consolidated VIE without recourse to 21Vianet Group, Inc.	$ 3,016	¥ 18,793	¥ 5,819
Class A Ordinary Shares
Ordinary shares, par value \| (per share)	$ 0.00001	¥ 0.00001	¥ 0.00001
Ordinary shares, shares authorized	470,000,000	470,000,000	470,000,000
Ordinary shares, shares issued	282,959,863	282,959,863	180,993,644
Ordinary shares, shares outstanding	282,959,863	282,959,863	180,993,644
Class B Ordinary Shares
Ordinary shares, par value \| (per share)	$ 0.00001	¥ 0.00001	¥ 0.00001
Ordinary shares, shares authorized	300,000,000	300,000,000	300,000,000
Ordinary shares, shares issued	64,038,642	64,038,642	154,632,392
Ordinary shares, shares outstanding	64,038,642	64,038,642	154,632,392

CONSOLIDATED STATEMENTS OF OPERATIONS ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($) $ / shares shares	Dec. 31, 2012 CNY (¥) ¥ / shares shares	Dec. 31, 2011 CNY (¥) ¥ / shares shares	Dec. 31, 2010 CNY (¥) ¥ / shares shares
Net revenues
Hosting and related services	$ 139,144	¥ 866,882	¥ 614,612	¥ 374,946
Managed network services	105,500	657,276	406,317	150,257
Total net revenues	244,644	1,524,158	1,020,929	525,203
Cost of revenues	(176,318)	(1,098,477)	(744,371)	(396,858)
Gross profit	68,326	425,681	276,558	128,345
Operating expenses
Sales and marketing expenses	(17,636)	(109,871)	(80,885)	(51,392)
General and administrative expenses	(24,640)	(153,512)	(82,926)	(282,298)
Research and development expenses	(10,261)	(63,929)	(34,657)	(19,924)
Changes in the fair value of contingent purchase consideration payable	(2,798)	(17,430)	(63,185)	(7,537)
Operating (loss) profit	12,991	80,939	14,905	(232,806)
Interest income	2,616	16,301	14,939	580
Interest expense	(1,826)	(11,376)	(4,398)	(2,793)
Other income	1,864	11,616	1,943	1,152
Other expense	(348)	(2,167)	(520)	(906)
Loss from equity method investment	(177)	(1,101)
Foreign exchange gain	(64)	(397)	32,747	1,646
(Loss) profit from continuing operations before income taxes	15,056	93,815	59,616	(233,127)
Income tax expense	(5,804)	(36,159)	(13,677)	(1,588)
Net profit (loss) from continuing operations	9,252	57,656	45,939	(234,715)
Loss from discontinued operations \| ¥				(12,952)
Net (loss) profit	9,252	57,656	45,939	(247,667)
Net income attributable to non-controlling interest	(214)	(1,332)	(27,495)	(7,722)
Net (loss) income attributable to the company's ordinary shareholders	$ 9,038	¥ 56,324	¥ 18,444	¥ (255,389)
Earnings (loss) per share:
Net profit (loss) from continuing operations \| (per share)	$ 0.03	¥ 0.16	¥ 0.07	¥ (3.39)
Loss from discontinued operations \| ¥ / shares				(0.18)
Basic \| (per share)	0.03	0.16	0.07	(3.57)
Net profit (loss) from continuing operations \| (per share)	0.03	0.16	0.06	(3.39)
Loss from discontinued operations \| ¥ / shares				(0.18)
Diluted \| (per share)	$ 0.03	¥ 0.16	¥ 0.06	¥ (3.57)
Shares used in earnings (loss) per share computation:
Basic \| shares	342,533,167	342,533,167	259,595,677	71,526,320
Diluted \| shares	356,784,209	356,784,209	316,807,661	182,492,500

CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)	Dec. 31, 2010 CNY (¥)
Net (loss) profit	$ 9,252	¥ 57,656	¥ 45,939	¥ (247,667)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments, net of tax	(348)	(2,171)	(56,253)	758
Other comprehensive income (loss), net of tax	(348)	(2,171)	(56,253)	758
Comprehensive (loss) income	8,904	55,485	(10,314)	(246,909)
Less: comprehensive income attributable to non-controlling interest	2,970	18,502	17,170	120,371
Comprehensive (loss) income attributable to the Company's ordinary shareholders	$ 11,874	¥ 73,987	¥ 6,856	¥ (126,538)

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to noncontrolling interests. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the economic entity, including both controlling (parent) and noncontrolling interests. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, including any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 19
-URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 55
-Paragraph 4K
-URI http://asc.fasb.org/extlink&oid=18733213&loc=SL4591552-111686

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (a),(c)
-URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 55
-Paragraph 4J
-URI http://asc.fasb.org/extlink&oid=18733213&loc=SL4591551-111686

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 29
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph c(1)
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 5
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph A1, A4, A5
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

CASH FLOWS FROM OPERATING ACTIVITIES

CONSOLIDATED STATEMENTS OF CASH FLOWS
¥ in Thousands, $ in Thousands

12 Months Ended

Dec. 31, 2012

USD ($)

Dec. 31, 2012

CNY (¥)

Dec. 31, 2011

CNY (¥)

Dec. 31, 2010

CNY (¥)

Net profit/(loss) from continuing operations

$ 9,252

¥ 57,656

¥ 45,939

¥ (234,715)

Loss from discontinued operations

(12,952)

Adjustments to reconcile net loss to net cash generated from operating activities:

Foreign exchange (loss) gain

397

(32,747)

(1,646)

Changes in the fair value of contingent purchase consideration payable

2,798

17,430

63,185

7,537

Depreciation of property and equipment

14,893

92,786

58,873

21,854

Amortization of intangible assets

5,678

35,377

30,104

11,658

Loss on disposal of property and equipment

287

1,786

412

759

Loss on disposal of intangible assets

Provision for doubtful accounts

538

183

1,097

Stock based compensation expense

10,856

67,632

41,959

277,881

Deferred income taxes

(1,496)

(9,322)

(18,492)

(9,050)

Bargain purchase gain

(1,692)

(10,539)

Loss from equity method investment

177

1,101

Changes in operating assets and liabilities:

Accounts receivable

(21,153)

(131,783)

(66,436)

(24,892)

Prepayments and other current assets

(1,145)

(7,131)

(6,701)

5,481

Amounts due from related parties

5,736

35,713

(34,093)

(7,862)

Accounts payable

3,243

20,204

14,955

(7,441)

Unrecognized tax benefits (expense)

(2,321)

(14,461)

21,226

4,271

Accrued expenses and other payables

(106)

(660)

48,291

6,103

Advances from customers

(1,148)

(7,155)

5,918

6,630

Income taxes payable

2,831

17,639

2,089

1,474

Deferred government grants

2,082

12,974

419

5,400

Amounts due to related parties

(1,005)

(6,259)

(8,952)

29,742

Net cash generated from operating activities

27,917

173,923

166,135

81,372

CASH FLOWS FROM INVESTING ACTIVITIES

Purchases of property and equipment

(71,704)

(446,725)

(255,755)

(58,619)

Purchases of intangible assets

(21,489)

(133,882)

(802)

(730)

Proceeds from disposal of property and equipment

202

7,598

26,713

Payments for short-term investments

(42,926)

(267,434)

(1,650,295)

Loan to a related party

(2,412)

(15,024)

Proceeds received from maturity of short-term investments

150,764

939,273

747,144

Payments for acquisitions, net of cash acquired (Note 4)

(10,765)

(67,067)

(107,744)

(47,560)

Payments for long-term investments

(8,106)

(50,500)

(8,200)

Loans to shareholder of iJoy Holding Limited (Note 4)

(2,068)

(12,885)

Deemed distribution to the shareholders for the accounting disposal of the Non-IDC business of Shanghai Guotong Network Co., Ltd., net (Note 1(b)(iii))

(19,523)

(121,628)

36,564

Deemed contribution from shareholders for the accounting disposal of the Non-IDC business of Guangzhou Juliang Internet Information Technology Co., Ltd., net (Note 1(b)(iii))

3,716

Deemed contribution from the shareholders for the legal disposal of certain carved-out entities (Note 1(b)(iv))

39,300

Net cash used in investing activities

(28,197)

(175,670)

(1,268,054)

(616)

CASH FLOWS FROM FINANCING ACTIVITIES

Proceeds from exercise of stock options

(46,097)

(287,188)

(137)

6,835

530

3,300

9,798

Proceeds from issuance of ordinary shares

1,332,904

Amounts due to related parties

(111,350)

Repurchase of ordinary shares

(190,022)

Proceeds from issuance of preferred shares

230,220

Dividends paid to non-controlling interest

(3,816)

Proceeds from long-term bank borrowings

37,219

231,879

Proceeds from short-term bank borrowings

28,404

176,961

110,000

55,000

Repayment of long-term bank borrowings

(161)

(1,000)

Repayment of short-term bank borrowings

(16,051)

(100,000)

(45,000)

(20,000)

Net cash (used in) generated from financing activities

3,844

23,952

1,443,947

(69,498)

Effect of foreign exchange rate changes on cash and short term investments

(55)

(340)

(14,895)

Net increase (decrease) in cash

3,509

21,865

327,133

11,258

Cash and cash equivalents at beginning of year

65,873

410,389

83,256

71,998

Cash and cash equivalents at end of year

69,382

^[1]

432,254

^[1]

410,389

83,256

Supplemental disclosures of cash flow information:

Income taxes paid

(7,141)

(44,491)

(8,854)

(2,934)

Interest paid

(1,706)

(10,630)

(4,398)

(2,793)

Interest received

3,146

19,598

4,644

580

Supplemental disclosures of non-cash activities:

Purchase of property and equipment through capital leases

(1,739)

(10,837)

25,894

61,678

Purchase of property and equipment included in accrued expenses and other payables, notes payable, and amounts due related parties

2,054

12,797

4,930

29,676

Purchase of intangible assets included in accrued expenses and other payables

3,172

19,761

218

(229)

Disposal of property and equipment included in amounts due from related parties

5,913

(5,913)

Disposal of intangible assets included in amounts due from related parties

(917)

Contingent consideration related to the acquisitions of the Managed Network Entities, Gehua and Fastweb included in the amounts due to related parties

$ (3,620)

¥ (23,889)

77,686

136,741

Call option to purchase the remaining 49% equity interest in the Managed Network Entities

(6,765)

Waiver of liability from the shareholder (Note 1(b)(v))

¥ (116,069)

Conversion of redeemable convertible preferred shares into ordinary shares concurrent with initial public offering

¥ 1,221,330

[1]	As of December 31, 2012, besides these cash and cash equivalents, the Company also holds fixed rate time deposits with maturities greater than three months of RMB222,701 (US$35,746).

CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - Dec. 31, 2012 ¥ in Thousands, $ in Thousands	USD ($)	CNY (¥)
Fixed rate time deposits with maturities greater than three months	$ 35,746	¥ 222,701

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' (DEFICIT) EQUITY ¥ in Thousands, $ in Thousands	USD ($) shares	CNY (¥) shares	Ordinary shares USD ($) shares	Ordinary shares CNY (¥) shares	Treasury stock USD ($)	Treasury stock CNY (¥)	Additional paid-in capital USD ($)	Additional paid-in capital CNY (¥)	Accumulated other comprehensive income (loss) USD ($)	Accumulated other comprehensive income (loss) CNY (¥)	Statutory reserves USD ($)	Statutory reserves CNY (¥)	Accumulated deficit USD ($)	Accumulated deficit CNY (¥)	Total 21Vianet Group, Inc. shareholders' (deficit) equity USD ($)	Total 21Vianet Group, Inc. shareholders' (deficit) equity CNY (¥)	Non-controlling interest USD ($)	Non-controlling interest CNY (¥)
Beginning Balance (in shares) at Dec. 31, 2009 \| shares			71,526,320	71,526,320
Beginning Balance at Dec. 31, 2009		¥ (970,916)		¥ 5				¥ 68,960		¥ 716		¥ 10,422		¥ (1,068,004)		¥ (987,901)		¥ 16,985
Consolidated net profit (loss)		(247,667)												(255,389)		(255,389)		7,722
Other comprehensive income (loss), net of tax		758								758						758
Acquisition of the Managed Network Entities		98,019																98,019
Call option to purchase the remaining 49% equity interests in the Managed Network Entities		(6,765)																(6,765)
Additional paid in capital upon the reorganization		17						17								17
Capital contributed by non-controlling Interest		4,410																4,410
Share based compensation (in shares) \| shares			24,826,090	24,826,090
Share based compensation		277,881		¥ 2				277,879								277,881
Deemed distribution to the shareholders for the accounting disposal \| Non-IDC business of Shanghai Guotong Network Co., Ltd.		(27,869)												(27,869)		(27,869)
Deemed distribution to the shareholders for the accounting disposal \| Non-IDC business of Guangzhou Juliang Internet Information Technology Co.,Ltd.		(2,764)												(2,764)		(2,764)
Deemed contribution from shareholders for the legal disposal \| Guangzhou Juliang Internet Information Technology Co., Ltd.		10,000						10,000								10,000
Deemed contribution from the shareholders for the legal disposal of certain carved-out entities		39,300						39,300								39,300
Waiver of liability from the shareholder		116,069						116,069								116,069
Appropriation of statutory reserves												3,721		(3,721)
Ending Balance (in shares) at Dec. 31, 2010 \| shares			96,352,410	96,352,410
Ending Balance at Dec. 31, 2010		(709,527)		¥ 7				512,225		1,474		14,143		(1,357,747)		(829,898)		120,371
Consolidated net profit (loss)		45,939												18,444		18,444		27,495
Other comprehensive income (loss), net of tax		(56,253)								(56,253)						(56,253)
Share based compensation		41,959						41,959								41,959
conversion from preferred shares (in shares) \| shares			148,162,920	148,162,920
conversion from preferred shares		1,221,330		¥ 10				1,221,320								1,221,330
Net proceeds from issuance of ordinary shares upon IPO (in shares) \| shares			89,700,000	89,700,000
Net proceeds from issuance of ordinary shares upon IPO		1,332,904		¥ 5				1,332,899								1,332,904
Share repurchase (in shares) \| shares			(18,135,192)	(18,135,192)
Share repurchase		(190,022)				¥ (190,022)										(190,022)
Share options exercised (in shares) \| shares			10,226,440	10,226,440
Share options exercised		¥ 9,798		¥ 1				9,797								9,798
Shares issued to depository bank \| shares	8,207,178	8,207,178	8,207,178	8,207,178
Settlement of share options exercised with shares held by depository bank, share \| shares			(987,720)	(987,720)
Purchase of 49% equity interest in Managed Network Entities		¥ (169,168)						(42,288)								(42,288)		(126,880)
Settlement of stock consideration by treasury Stock (in shares) \| shares			2,100,000	2,100,000
Settlement of stock consideration by treasury stock		20,156				22,004		(1,848)								20,156
Reclassification of contingent consideration payable upon resolution of contingencies		126,424						126,424								126,424
Appropriation of dividend to non-controlling interests		(3,816)																(3,816)
Appropriation of statutory reserves												1,694		(1,694)
Ending Balance (in shares) at Dec. 31, 2011 \| shares			335,626,036	335,626,036
Ending Balance at Dec. 31, 2011		1,669,724		¥ 23		(168,018)		3,277,658		(54,779)		15,837		(1,418,167)		1,652,554		17,170
Beneficial conversion features related to the issuance of Series C1 Preferred Shares Entities								77,170						(77,170)
Consolidated net profit (loss)	$ 9,252	57,656												56,324		56,324		1,332
Other comprehensive income (loss), net of tax	$ (348)	(2,171)								(2,171)						(2,171)
Share based compensation		¥ 67,632						67,632								67,632
Share repurchase (in shares) \| shares			(2,686,965)	(2,686,965)
Share options exercised (in shares) \| shares	3,128,472	3,128,472	3,128,472	3,128,472
Share options exercised		¥ 3,300						3,300								3,300
Restricted share units vested \| shares			645,491	645,491
Settlement of share options exercised with shares held by depository bank \| shares			(3,773,963)	(3,773,963)
Settlement of stock consideration by treasury Stock (in shares) \| shares			14,059,434	14,059,434
Settlement of stock consideration by treasury stock						147,316		(146,899)		(417)
Reclassification of contingent consideration payable upon resolution of contingencies		93,164						93,164								93,164
Appropriation of statutory reserves												10,034		(10,034)
Ending Balance (in shares) at Dec. 31, 2012 \| shares			346,998,505	346,998,505
Ending Balance at Dec. 31, 2012	$ 303,253	¥ 1,889,305	$ 4	¥ 23	$ (3,323)	¥ (20,702)	$ 528,861	¥ 3,294,855	$ (9,208)	¥ (57,367)	$ 4,153	¥ 25,871	$ (220,204)	¥ (1,371,877)	$ 300,283	¥ 1,870,803	$ 2,970	¥ 18,502

ORGANIZATION

12 Months Ended

Dec. 31, 2012

ORGANIZATION

1.	ORGANIZATION

21Vianet Group, Inc. (the “Company”) was incorporated under the laws of the Cayman Islands on October 16, 2009.

The Company through its subsidiaries and consolidated variable interest entities (as disclosed in the table below) are principally engaged in the provision of Internet Data Center services (“IDC” or “IDC Business”) in the People’s Republic of China (the “PRC”).

On April 21, 2011, the Company completed its initial public offering of 14,950,000 American Depositary Shares (“ADS”) at US$15 per ADS. Each ADS comprises six ordinary shares. The net proceeds to the Company from the offering amounted to RMB1,332,904.

(a) As of December 31, 2012, subsidiaries of the Company and its consolidated variable interest entities where the Company is the primary beneficiary includes the following entities:


Entity	Date of incorporation/ Acquisition	Place of incorporation	Percentage of direct ownership by the Company			Principal activities
			Direct
Subsidiaries:
21ViaNet Group Limited (“21Vianet HK”)	May 25, 2007	Hong Kong		100	%	Investment holding
21ViaNet Data Center Co., Ltd. (“21Vianet China”) ⁽¹⁾	June 12, 2000	PRC		100	%	Provision of technical and consultation services and rental of long-lived assets
Fastweb International Holdings (“Fastweb Holdings”) ⁽⁵⁾	September 9, 2012	Cayman Islands		100	%	Investment holding
Hongkong Fastweb Holdings Co., Limited (“Fastweb HK”) ⁽⁵⁾	September 9, 2012	Hong Kong		100	%	Investment holding
Beijing Fastweb Technology Co., Ltd. (“Fastweb Technology”) ^(1) / (5)	September 9, 2012	PRC		100	%	Dormant Company
21Vianet (Foshan) Technology Co., Ltd. (“FS Technology”) ⁽¹⁾	December 20, 2011	PRC		100	%	Trading of network equipment
21Vianet Anhui Suzhou Technology Co., Ltd. (“SZ Technology”) ⁽¹⁾	November 16, 2011	PRC		100	%	Trading of network equipment
21ViaNet@Xian Holding Limited (“21V Xi’an Holding”) ⁽⁴⁾	July 5, 2012	British Virgin Islands		100	%	Investment holding
21Vianet (Xi’an) Technology Co., Ltd. (“Xi’an Tech”) ^(1) / (4)	July 5, 2012	PRC		100	%	Provision of internet data center

Variable Interest Entity (the “VIE”)
Beijing aBitCool Network Technology Co., Ltd. (“21Vianet Technology”) ^(1) / (2)	October 22, 2002	PRC		—		Provision of internet data center and managed network services

Held directly by 21Vianet Technology:
Beijing 21Vianet Broad Band Data Center Co., Ltd. (“21Vianet Beijing”) ^(1) / (2)	March 15, 2006	PRC		—		Provision of internet data center and managed network services

Held directly by 21Vianet Beijing:
Shanghai Wantong 21Vianet Information Technology Co., Ltd. (“SH Wantong”) ^(1) / (2)	February 20, 2008	PRC		—		Provision of internet data center services
21Vianet (Xi’an) Information Outsourcing Industry Park Services Co., Ltd. (“Xi’an Sub”) ^(1) / (2)	June 23, 2008	PRC		—		Provision of internet data center services
Beijing Chengyishidai Network Technology Co., Ltd. (“CYSD”) ^{(1) / (2) / (3)}	September 30, 2010	PRC		—		Provision of managed network services
Zhiboxintong (Beijing) Network Technology Co., Ltd. (“ZBXT”) ^(1) / (2) ^/ (3)	September 30, 2010	PRC		—		Provision of managed network services
Beijing Bozhiruihai Network Technology Co., Ltd.^(1) / (2) ^/ (3)	September 30, 2010	PRC		—		Provision of managed network services
Beijing Bikonghengtong Network Technology Co., Ltd. ^{(1) / (2) / (3)}	September 30, 2010	PRC		—		Provision of managed network services
Xingyunhengtong Beijing Network Technology Co., Ltd. ^{(1) / (2) / (3)}	September 30, 2010	PRC		—		Provision of managed network services
Fuzhou Yongjiahong Communication Technology Co., Ltd. ^{(1) / (2) / (3)}	September 30, 2010	PRC		—		Provision of managed network services
Jiujiang Zhongyatonglian Network Technology Co., Ltd. ^{(1) / (2) / (3)}	November 16, 2010	PRC		—		Provision of managed network services
Guangzhou Gehua Network Technology and Development Co., Ltd.^(1) (2)(“Gehua”)	October 8, 2011	PRC		—		Provision of managed network services
Shanghai Cloud 21Vianet Network Co., Ltd.^(1) / (2)(“SH Cloud”)	October 1, 2011	PRC		—		Dormant Company
Shenzhen Cloud Information Technology Co., Ltd. ^(1) / (2)(“SZ Cloud”)	October 27, 2011	PRC		—		Dormant Company
Langfang Xunchi Computer Data Processing Co., Ltd. ^(1) / (2)	December 19, 2011	PRC		—		Dormant Company
Beijing Fastweb Network Technology Co., Ltd. (“Fastweb Network BJ”) ^{(1) / (2) / (5)}	September 9, 2012	PRC		—		Provision of internet data center and internet content delivery network services
Shanghai Fawei Technology Co., Ltd. (“SH Fawei”) ^{(1) / (2) / (5)}	July 18, 2008	PRC		—		Internet data center, content delivery network and related services
Suzhou Fastweb Technology Co., Ltd. (“SZ Fastweb”) ^{(1) / (2) / (5)}	February 1, 2010	PRC		—		Dormant Company
Hangzhou Zhentuo Information Technology Co., Ltd. (“HZ Zhentuo”) ^{(1) / (2) / (6)}	August 16, 2012	PRC		—		Dormant Company
Shanghai Xiangyun 21Vianet Network Technology Co., Ltd. (“SH Xiangyun”) ^{(1) / (2) / (7)}	October 22, 2012	PRC		—		Dormant Company

(1)

Collectively “PRC Subsidiaries”

(2)

Collectively “Consolidated VIE”

(3)

Collectively “Managed Network Entities”

(4)

On July 5, 2012, the Company through its wholly-owned subsidiary, 21Vianet HK, acquired 100% equity interests in these entities (collectively referred to as “21V Xi’an”) from 21 Vianet Infrastructure Limited, a subsidiary of aBitCool Inc. (“aBitCool”) (Note 4).

(5)

On September 9, 2012, the Company and its subsidiary, 21Vianet Beijing, acquired 100% equity interests in these entities (collectively referred to as “Fastweb”) (Note 4).

(6)

On August 16, 2012, HZ Zhentuo was incorporated in Hangzhou in the PRC by 21Vianet Beijing as a wholly-owned subsidiary.

(7)

On October 22, 2012, SH Xiangyun was incorporated in Shanghai in the PRC by 21Vianet Beijing as a wholly-owned subsidiary.

As more fully described below, through a series of transactions which are accounted for as a reorganization of entities where the transactions were deemed to lack substance and accounted for in a manner similar to a pooling-of interest, the Company became the ultimate parent entity of such subsidiaries and consolidated variable interest entity by October 31, 2010. Accordingly, the accompanying consolidated financial statements have been prepared as if the current corporate structure had been in existence throughout the periods presented.

(b) Upon incorporation, the Company was wholly owned by aBitCool, a company owned by a group of four ordinary shareholders. Prior to the reorganization, the Company’s IDC and Non-IDC operations were conducted by aBitCool, substantially all of which was conducted through the same subsidiaries and variable interest entities set forth above. In addition, aBitCool was also engaged in other insignificant business operations, which were dissimilar and incidental to the core IDC Business, through five subsidiaries/investees of certain of the above entities, which have insignificant assets, liabilities and operating results since their inception. aBitCool also issued Series A contingently redeemable convertible preferred shares in 2006, 2007 and 2008 and Series B contingently redeemable convertible preferred shares in 2007 and 2008, to a number of third party investors, the proceeds of which had been used to finance the operations and investing activities of these business through a series of intercompany loans.

In preparation of its IPO for the IDC business, the Company undertook the following transactions to reorganize the structure of the listing group:

(i)

On January 13, 2010, aBitCool transferred all of its 100% equity interest in 21Vianet HK to the Company in exchange for a cash consideration of HK$1.

(ii)

On February 21, 2010, aBitCool transferred all of its 100% equity interest in 21Vianet China to 21Vianet HK in exchange for a cash consideration of US$1.

(iii)

On April 30, 2009 and March 1, 2010, 21Vianet Beijing legally disposed SH Guotong and GZ Juliang to the nominee shareholders of aBitCool, in return for cash consideration of RMB68,960 and RMB10,000. Subsequent to their legal disposal, the Company continued to manage the operations of SH Guotong and GZ Juliang, therefore not meeting all of the carve-out criteria pursuant to the Staff Accounting Bulletin (“SAB”) Topic 5.Z.7 and as such, was required to continue consolidating all of SH Guotong’s results of operations. Accordingly, the receipt of cash consideration for the legal disposal of SH Guotong and GZ Juliang is recorded as a deemed contribution from the shareholders.

SH Guotong—SH Guotong’s operations had historically comprised the IDC and Non-IDC Businesses since its acquisition on June 22, 2007. The divestiture of the Company’s Non-IDC Business to its ultimate shareholders was contemplated as part of the Company’s corporate restructuring pursuant to their ultimate IPO plans of the IDC Business. As part of the restructuring, 21Vianet Beijing (i) on April 30, 2009 legally disposed of SH Guotong to the nominee shareholders of aBitCool, in return for cash consideration of RMB68,960, which was subsequently settled in September 2010 and was recorded in amounts due from related parties as of December 31, 2009 and (ii) on March 31, 2010, legally repurchased the IDC Business’ long-lived assets, employees, and sales agreements of SH Guotong from same nominee shareholders of aBitCool for a cash consideration of RMB1,426. From the date of the disposal to date of repurchase, SH Guotong remained under the ownership of the same shareholder group and management of the Company continued to manage both SH Guotong’s IDC and Non-IDC Businesses. As such, the Company concluded that there was no substance to the legal disposal, other than part of the plan to effect a divestiture of the Non-IDC Business of SH Guotong to the Company’s ultimate shareholders.

The cash consideration exchanged for the disposal and repurchase was required under the prevailing PRC tax regulations for the disposal of equity interests or assets, and was recorded as a deemed contribution and distribution from and to shareholders, respectively. On March 31, 2010, when in substance, the Non-IDC Business was disposed to the Company’s ultimate shareholders, the Company deconsolidated the net assets of SH Guotong’s Non-IDC Business at their respective carrying values totaling RMB27,869, which was recorded as a deemed distribution to the shareholders. On the same date, the divested Non-IDC Business qualified for discontinued operation in accordance with Accounting Standards Codification (“ASC”) 205-20, Discontinued Operations, and its operating results have been accordingly presented in the consolidated statements of operations for all years presented (Note 22).

GZ Juliang—GZ Juliang’s operations had historically comprised the IDC and Non-IDC Businesses since its incorporation on January 4, 2008. The divestiture of the Company’s Non-IDC Business to its ultimate shareholders was contemplated as part of the Company’s corporate restructuring pursuant to their ultimate IPO plans of the IDC Business. As part of the restructuring, 21Vianet Beijing (i) on March 1, 2010 legally disposed of GZ Juliang to the nominee shareholders of aBitCool, in return for cash consideration of RMB10,000, which was subsequently settled in August 2010 and (ii) on March 31, 2010, legally repurchased the IDC Business’ long-lived assets, employees, and sales agreements of GZ Juliang from same nominee shareholders of aBitCool for a cash consideration of RMB858. From the date of the disposal to date of repurchase, GZ Juliang remained under the ownership of the same shareholder group and management of the Company continued to manage both GZ Juliang’s IDC and Non-IDC Businesses. As such, the Company concluded that there was no substance to the legal disposal, other than part of the plan to effect a divestiture of the Non-IDC Business of GZ Juliang to the Company’s ultimate shareholders. The cash consideration exchanged for the disposal and repurchase was required under the prevailing PRC tax regulations for the disposal of equity interests or assets, and was recorded as a deemed contribution and distribution from and to shareholders, respectively. On March 31, 2010, when in substance, the Non-IDC Business was disposed to the Company’s ultimate shareholders, the Company deconsolidated the net assets of GZ Juliang’s Non-IDC Business at their respective carrying values totaling RMB2,764, which was recorded as a deemed distribution to the shareholders. On the same date, the divested Non-IDC Business qualified for discontinued operation in accordance with ASC 205-20, and its operating results have been accordingly presented in the consolidated statements of operations for all years presented (Note 22).

(iv)

Four subsidiaries of 21Vianet Beijing and one associate of 21Vianet Technology were also engaged in other insignificant business operations, which were dissimilar and incidental to the Company’s core IDC Business. In accordance with the SAB Topic 5.Z.7, the historical operating results, assets and liabilities of these five entities have not been included in these historical financial statements of the Company because (i) these entities were operated and managed autonomously by a management team different from that of the Company and will continue to do so into the foreseeable future; (ii) these entities are dissimilar to the Company in terms of their business models, revenue streams and customer bases and (iii) these entities incurred only incidental costs and facilities with the Company.

In 2008, 21Vianet Beijing injected RMB36,000 of capital injection into two of these entities that have been carved out of these historical financial statements, and as such, the amount is recorded as a deemed distribution to shareholders.

In 2010, 21Vianet Beijing and 21Vianet Technology legally disposed two carved-out subsidiaries and a carved-out associate, to aBitCool, for cash consideration of RMB36,000 and RMB3,300, respectively. As these entities have already been carved out of these consolidated financial statements, the cash consideration received was recorded as a deemed contribution from shareholders.

(v)

On October 31, 2010, the Company repurchased and cancelled all of its ordinary shares from aBitCool and concurrently issued 71,526,320 ordinary shares and 110,966,180 preferred shares to the same group of ordinary and preferred shareholders of aBitCool at nominal value, based on the same respective ordinary and preferred shareholders’ ownership percentage. These ordinary shares and preferred shares carried the same rights and obligations as those issued by aBitCool, except that the number of preferred shares issued by the Company was determined by applying (i) the relative fair value percentage of the IDC Business (when compared to the Non-IDC Business) of 85% as of October 31, 2010 to (ii) the total number of outstanding preferred shares of aBitCool. The number of preferred shares outstanding of aBitCool was also correspondingly adjusted. The initial carrying values of the preferred shares of the Company were based on the estimated fair values at issuance date in accordance with ASC 480-10-S99-3A, Classification and Measurement of Redeemable Securities (Note 16). As no consideration was received for the issuance of the preferred shares, the issuance was recorded as a distribution to shareholders.

Given there was no change in each shareholder’s proportionate shareholdings and respective rights and obligations before and after the reorganization, the transaction was deemed to lack substance and accounted for in a manner similar to a pooling-of interest with the assets and liabilities stated at their historical amounts in the Company’s consolidated financial statements. Accordingly, the accompanying consolidated financial statements have been prepared as if the current corporate structure had been in existence throughout the periods presented. Accordingly, the preferred shares issued by the Company are pushed back to all periods presented.

In addition, aBitCool and its shareholders formally agreed to waive the Company’s obligation to repay its intercompany payable due to them in the amount of RMB115,266 (US$17,465) and as such, the waiver of the payable obligation was recorded as a contribution to additional paid-in-capital on October 31, 2010. The payable obligation has been presented as an amount due to a related party for all periods presented through to the date of the waiver.

The following is a summary of the VIE agreements between 21Vianet Technology, the VIE, its Nominee Shareholders, and 21Vianet China, the primary beneficiary of 21Vianet Technology:

Exclusive option agreement

Pursuant to the exclusive option agreement amongst 21Vianet China and the Nominee Shareholders of 21Vianet Technology, the Nominee Shareholders granted the Company or its designated party, an exclusive irrevocable option to purchase all or part of the equity interests held by the Nominee Shareholders in 21Vianet Technology, when and to the extent permitted under PRC law, at an amount equal to RMB1. 21Vianet Technology cannot declare any profit distributions or grant loans in any form without the prior written consent of the 21Vianet China. The Nominee Shareholders must remit in full any funds received from 21Vianet Technology to 21Vianet China, in the event any distributions are made by the 21Vianet Technology pursuant to any written consents of 21Vianet China. The term of this agreement is 10 years, expiring on December 18, 2016, which is renewable at the sole discretion of 21Vianet China.

Exclusive technical consulting and service agreement

Pursuant to the exclusive technical consulting and service agreement between 21Vianet China and the 21Vianet Technology, 21Vianet China is to provide exclusive management consulting services and internet technical services in return for fees based on of a predetermined hourly rate of RMB1, which is adjustable at the sole discretion of 21Vianet China. The term of this agreement is 10 years, expiring on December 18, 2016, which is renewable at the sole discretion of 21Vianet China.

Loan agreement

In January 2011, 21Vianet China and the Nominee Shareholders entered into a loan agreement. Pursuant to the agreement, 21Vianet China has provided interest-free loan facilities of RMB7,000 and RMB3,000, respectively, to the Nominee Shareholders of 21Vianet Technology for the purpose of providing capital to 21Vianet Technology to develop its data center and telecommunications value-added business and related businesses. There is no fixed term for the loan.

Power of attorney agreement

The Nominee Shareholders entered into the power of attorney agreement whereby they granted an irrevocable proxy of the voting rights underlying their respective equity interests in the 21Vianet Technology to 21Vianet China, which includes, but are not limited to, all the shareholders’ rights and voting rights empowered to the Nominee Shareholders by the company law and the Company’s Articles of Association. The power of attorney remains valid and irrevocable from the date of execution, so long as each Nominee Shareholder remains as a shareholder of 21Vianet Technology.

Share pledge agreement

Pursuant to the share pledge agreement between 21Vianet China and the Nominee Shareholders, the Nominee Shareholders have contemporaneously pledged all their equity interests in 21Vianet Technology to guarantee the repayment of the loan under the Loan Agreement between 21Vianet China and the Nominee Shareholders.

If 21Vianet Technology breaches its respective contractual obligations under the Share pledge agreement and the loan agreement, 21Vianet China, as pledgee, will be entitled to certain rights, including the right to sell the pledged equity interests. The Nominee Shareholders agreed not to transfer, sell, pledge, dispose of or otherwise create any new encumbrance on their equity interests in the 21Vianet Technology without the prior written consent of 21Vianet China.

Despite the lack of technical majority ownership, there exists a parent-subsidiary relationship between the Company and 21Vianet Technology through the irrevocable power of attorney agreement, whereby the Nominee Shareholders effectively assigned all of their voting rights underlying their equity interest in 21Vianet Technology to 21Vianet China. In addition, the Company, through 21Vianet China, obtained effective control over 21Vianet Technology through the ability to exercise all the rights of 21Vianet Technology’s shareholders pursuant to the share pledge agreement and exclusive option agreement. The Company demonstrates its ability and intention to continue to exercise the ability to absorb substantially all of the expected losses and receive substantially all of the economic benefits of 21Vianet Technology through 21Vianet China, pursuant to the loan agreement and consulting and service agreement, respectively. Thus, the Company is also considered the primary beneficiary of 21Vianet Technology through 21Vianet China. As a result of the above, the Company consolidates 21Vianet Technology and its subsidiaries under by ASC 810-10 Consolidation: Overall.

Subsequently, in September 2010, the following supplementary agreements were entered into:

21Vianet Group, Inc. agreed to provide unlimited financial support to 21Vianet Technology for its operations and agreed to forego the right to seek repayment in the event 21Vianet Technology is unable to repay such funding.

21Vianet China also re-assigned the power of attorney agreement whereby they granted an irrevocable proxy of the voting rights underlying their respective equity interests in 21Vianet Technology to 21Vianet Group, Inc., which includes, but are not limited to, all the shareholders’ rights and voting rights empowered to the Nominee Shareholders by the company law and the Company’s Article of Association.

Accordingly, as a result of the power to direct the activities of 21Vianet Technology pursuant to the power of attorney agreement and the obligation to absorb the expected losses of 21Vianet Technology through the unlimited financial support, 21Vianet China ceased to be the primary beneficiary and 21Vianet Group, Inc. became the primary beneficiary of 21Vianet Technology in September 2010.

In February 2011, one of the original Nominee Shareholders of 21Vianet Beijing transferred 1% of his equity interests in 21Vianet Beijing to one additional individual person. Accordingly, the additional Nominee Shareholder also became a party to the above applicable agreements.

In the opinion of the Company’s management and PRC counsel, (i) the ownership structure of 21Vianet China and 21Vianet Technology is not in breach or violation of any existing PRC Laws in any material respect, (ii) each of the VIE Agreements to which it is a party is valid, legally binding and enforceable to each party of such agreements under the existing PRC Laws, (iii) the execution, delivery, effectiveness, enforceability and performance of each of the VIE Agreements will not violate any PRC Laws, except for such violation that would not have a material adverse effect, and (iv) each of the PRC Subsidiaries is in compliance with the provisions of such necessary governmental authorizations in all material aspects.

However, there are substantial uncertainties regarding the interpretation and application of current and future PRC laws and regulations. Accordingly, the Company cannot be assured that PRC regulatory authorities will not ultimately take a contrary view to its opinion. If the current ownership structure of the Company and its contractual arrangements with 21Vianet Technology are found to be in violation of any existing or future PRC laws and regulations, the Company may be required to restructure its ownership structure and operations in the PRC to comply with the changing and new PRC laws and regulations. To the extent that changes and new PRC laws and regulations prohibit the Company’s VIE arrangements from complying with the principles of consolidation, the Company would have to deconsolidate the financial position and results of operations of its VIE. In the opinion of management, the likelihood of loss in respect of the Company’s current ownership structure or the contractual arrangements with 21Vianet Technology is remote based on current facts and circumstances.

Except for certain computer and network equipment with carrying amounts of RMB46,320 that were pledged to secure banking borrowings granted to the Company (Note 12), there were no pledges or collateralization of the Consolidated VIE’s assets. Creditors of the Consolidated VIE have no recourse to the general credit of the Company, who is the primary beneficiary of the Consolidated VIE, and such amounts have been parenthetically presented on the face of the consolidated balance sheets. The Company has not provided any financial or other support that it was not previously contractually required to provide to the Consolidated VIE during the periods presented.

The following financial information of the Consolidated VIE was included in the accompanying consolidated financial statements as of December 31, 2011 and 2012 and for the years ended December 31, 2010, 2011 and 2012:


	As of December 31,
	2011		2012
	RMB		RMB		US$
Total assets		1,165,210		1,630,208		261,666
Total liabilities		704,879		930,038		149,281


	For the Year Ended December 31,
	2010		2011		2012
	RMB		RMB		RMB		US$
Net revenues		525,203		1,020,929		1,524,158		244,644
Net profit		30,668		51,566		122,552		19,671


	For the Year Ended December 31,
	2010			2011			2012
	RMB			RMB			RMB			US$
Net cash provided by operating activities		80,663			150,739			169,304			27,175
Net cash used in investing activities		(616	)		(224,704	)		(205,069	)		(32,916	)
Net cash provided by financing activities		41,835			86,109			110,076			17,668

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

12 Months Ended

Dec. 31, 2012

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

(a)

Basis of Presentation

The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”).

(b)

Principles of Consolidation

The consolidated financial statements include the financial statements of the Company, its subsidiaries and the Consolidated VIE for which the Company or a subsidiary of the Company is the primary beneficiary. All significant inter-company transactions and balances between the Company, its subsidiaries and the Consolidated VIE are eliminated upon consolidation. Results of acquired subsidiaries and its Consolidated VIE are consolidated from the date on which control is transferred to the Company.

(c)

Use of estimates

The preparation of the consolidated financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the period. Areas where management uses subjective judgment include, but are not limited to, estimating the useful lives of long-lived assets and intangible assets, assessing the initial valuation of the assets acquired and liabilities assumed in a business combination and the subsequent impairment assessment of long-lived assets, intangible assets and related goodwill, determining the provision for accounts receivable, accounting for deferred income taxes, and accounting for share-based compensation arrangements. The valuation of and accounting for the Company’s purchase consideration (Note 4) also requires significant estimates and judgments provided by management. The results of the continuing operations and discontinued operations are determined by using a combination of specific identification of revenues and certain costs as well as a reasonable allocation of the remaining costs using applicable cost drivers where specific identification is not determinable. Changes in facts and circumstances may result in revised estimates. Actual results could differ from those estimates, and as such, differences may be material to the consolidated financial statements.

(d)

Foreign Currency

The functional currency of the Company, 21Vianet HK, 21V Xi’an Holding, Fastweb Holdings and Fastweb HK is the United States dollar (“US$”), whereas the functional currency of the Company’s PRC subsidiaries and its Consolidated VIE is the Chinese Renminbi (“RMB”) as determined based on the criteria of ASC 830, Foreign Currency Matters. The Company uses the RMB as its reporting currency. Transactions denominated in foreign currencies are re-measured into the functional currency at the exchange rates prevailing on the transaction dates. Foreign currency denominated financial assets and liabilities are re-measured at the balance sheet date exchange rate. Exchange gains and losses are included in foreign exchange gains and losses in the consolidated statements of operations.

Assets and liabilities of the Company, 21Vianet HK, 21V Xi’an Holding, Fastweb Holdings and Fastweb HK are translated into RMB at fiscal year-end exchange rates. Income and expense items are translated at average exchange rates prevailing during the fiscal year. The resulting translation adjustments are recorded in other comprehensive loss within the statements of comprehensive income.

(e)

Convenience Translation

Amounts in US$ are presented for the convenience of the reader and are translated at the noon buying rate of US$1.00 to RMB6.2301 on December 31, 2012 in the City of New York for cable transfers of RMB as certified for customs purposes by the Federal Reserve Bank of New York. No representation is made that the RMB amounts could have been, or could be, converted into US$ at such rate.

(f)

Cash, Cash Equivalents and Short-term investments

Cash and cash equivalents consist of cash on hand and demand deposits placed with banks or other financial institutions which are unrestricted as to withdrawal and use and have original maturities less than three months. All highly liquid investments with a stated maturity of 90 days or less from the date of purchase are classified as cash equivalents. All highly liquid investments with stated maturities of greater than 90 days but less than 365 days are mainly fixed rate time deposits that are classified as short-term investments, which are stated at their approximate fair values.

(g)

Restricted cash

Restricted cash represents amounts held by a bank in escrow as security for notes payable, credit facilities and the guarantee of compliance with the network and service requirements of the radio spectrum license awarded by the Hong Kong Telecommunication Authority.

(h)

Accounts Receivable and Allowance for Doubtful Accounts

Accounts receivable are carried at net realizable value. An allowance for doubtful accounts is recorded in the period when loss is probable based on an assessment of specific evidence indicating troubled collection, historical experience, accounts aging and other factors. An accounts receivable is written off after all collection effort has ceased.

(i)

Property and equipment

Property and equipment are stated at cost and are depreciated using the straight-line method over the estimated useful lives of the assets, as follows:


Category		Estimated useful life
Buildings		25 years
Leasehold improvements		Over the shorter of lease term or the estimated useful lives of the assets
Optical fibers		20 years
Computer and network equipment		5 years
Office equipment		5 years
Motor vehicles		5 years

Repair and maintenance costs are charged to expense as incurred, whereas the costs of betterments that extend the useful life of property and equipment are capitalized as additions to the related assets. Retirements, sale and disposals of assets are recorded by removing the cost and accumulated depreciation with any resulting gain or loss reflected in the consolidated statements of operations.

Property and equipment that are purchased or constructed which require a period of time before the assets are ready for their intended use are accounted for as construction-in-progress. Construction-in-progress is recorded at acquisition cost, including installation costs. Construction-in-progress is transferred to specific property and equipment accounts and commences depreciation when these assets are ready for their intended use.

Interest costs are capitalized if they are incurred during the acquisition, construction or production of a qualifying asset and such costs could have been avoided if expenditures for these assets have not been made. Capitalization of interest costs commences when the activities to prepare the asset are in progress and expenditures and borrowing costs are incurred. Interest costs are capitalized until the assets are ready for their intended use. The Company did not incur significant capitalized interest during the year ended December 31, 2010. Interest capitalized during the years ended December 31, 2011 and 2012 amounted to RMB5,037 and RMB11,718 (US$1,881), respectively.

(j)

Intangible assets

Intangible assets are carried at cost less accumulated amortization and any recorded impairment. Intangible assets acquired in a business combination are recognized initially at fair value at the date of acquisition. Intangible assets with finite useful lives, except for acquired customer relationships in the acquisition of the Managed Network Entities which is amortized using an accelerated method of amortization, are amortized using a straight-line method of amortization. These amortization methods reflect the estimated pattern in which the economic benefits of the respective intangible assets are to be consumed.

Intangible assets have weighted average useful lives from the date of purchase as follows:


Purchased software		4.9 years
Radio spectrum license		15 years
Network use right		20 years
Contract backlog *		1.1 years
Customer relationships *		7.3 years
Supplier relationships *		9.5 years
Licenses *		15 years
Trade Name *		15 years
Platform software *		5 years

Acquired in the acquisition of SH Guotong, the Managed Network Entities, Gehua and Fastweb (Note 4).

(k)

Long-term investments

The Company’s long-term investments consist of cost method investments and equity method investments.

In accordance with ASC 325-20, Investments-Other: Cost Method Investments, for investments in an investee over which the Company does not have significant influence, the Company carries the investment at cost and only adjusts for other-than-temporary declines in fair value and distributions of earnings. The Company’s management regularly evaluates the impairment of its cost method investments based on the performance and financial position of the investee as well as other evidence of estimated market values. Such evaluation includes, but is not limited to, reviewing the investee’s cash position, recent financing, projected and historical financial performance, cash flow forecasts and current and future financing needs. An impairment loss is recognized in the consolidated statements of operations equal to the excess of the investment’s cost over its fair value at the balance sheet date of the reporting period for which the assessment is made. The fair value would then become the new cost basis of investment.

Investments in equity investees represent investments in entities in which the Company can exercise significant influence but does not own a majority equity interest or control are accounted for using the equity method of accounting in accordance with ASC 323-10, Investments-Equity Method and Joint Ventures: Overall. The Company applies the equity method of accounting that is consistent with ASC 323-10 in limited partnerships in which the Company holds a three percent or greater interest. Under the equity method, the Company initially records its investment at cost and prospectively recognizes its proportionate share of each equity investee’s net profit or loss into its consolidated statements of operations. The difference between the cost of the equity investee and the amount of the underlying equity in the net assets of the equity investee is recognized as equity method goodwill included in equity method investment on the consolidated balance sheets. The Company evaluates its equity method investments for impairment under ASC 323-10. An impairment loss on the equity method investments is recognized in the consolidated statements of income when the decline in value is determined to be other-than-temporary.

(l)

Goodwill

Goodwill represents the excess of the purchase price over the amounts assigned to the fair value of the assets acquired and the liabilities assumed of an acquired business. The Company’s goodwill at December 31, 2011 and 2012 were related to its acquisitions of SH Guotong, the Managed Network Entities, Gehua and Fastweb (Note 4). In accordance with ASC 350, Goodwill and Other Intangible Assets, recorded goodwill amounts are not amortized, but rather are tested for impairment annually or more frequently if there are indicators of impairment present. The Company has adopted Accounting Standards Update No. 2011-08 (“ASU 2011-08”), Intangibles—Goodwill and Others, pursuant to which the Company can elect to perform a qualitative assessment to determine whether the two-step impairment testing on goodwill is necessary.

The performance of the impairment test in accordance to ASC 350 involves a two-step process. The first step of the impairment test involves comparing the fair value of the reporting unit with its carrying amount, including goodwill. Fair value is primarily determined by computing the future discounted cash flows expected to be generated by the reporting unit. If the reporting unit’s carrying value exceeds its fair value, goodwill may be impaired. If this occurs, the Company performs the second step of the goodwill impairment test to determine the amount of impairment loss.

The fair value of the reporting unit is allocated to its assets and liabilities in a manner similar to a purchase price allocation in order to determine the implied fair value of the reporting unit’s goodwill. If the implied goodwill fair value is less than its carrying value, the difference is recognized an impairment loss.

In accordance with ASC 350, the Company assigned and assessed goodwill for impairment at the reporting unit level. A reporting unit is an operating segment or one level below the operating segment. The Company has determined it has one reporting unit, which is also its only operating segment. Goodwill that has arisen as a result of the acquisitions of SH Guotong, the Managed Network Entities, Gehua and Fastweb was assigned to this reporting unit.

In 2012, the Company elected to assess goodwill for impairment using the two-step process. As of October 1, 2012, the Company completed its annual impairment test for goodwill that has arisen out of the acquisitions of SH Guotong, the Managed Network Entities, Gehua. The Company determined the fair value of the reporting unit using the income approach based on the discounted expected cash flows associated with the reporting unit. The discounted cash flows for the reporting unit were based on six year projections. Cash flow projections were based on past experience, actual operating results and management best estimates about future developments as well as certain market assumptions. Cash flows after six years were estimated using a terminal value calculation, which considered terminal value growth at 3%, considering the long term revenue growth for entities in a similar industry in the PRC. The discount rate of approximately 13.5% was derived and used in the valuations which reflect the market assessment of the risks specific to the Company and its industry and is based on its weighted average cost of capital. The resulting fair value of the reporting unit was higher than its carrying value, and as such, the Company was not required to complete the second step; therefore, no impairment losses were recognized in 2012. Similarly, pursuant to the goodwill impairment tests in 2010 and 2011, no impairment losses were recognized.

(m)

Impairment of long-lived assets and intangibles

The Company evaluates its long-lived assets or asset group, including intangible assets with finite lives, for impairment whenever events or changes in circumstances (such as a significant adverse change to market conditions that will impact the future use of the assets) indicate that the carrying amount of an asset or a group of long-lived assets may not be recoverable. When these events occur, the Company evaluates for impairment by comparing the carrying amount of the assets to future undiscounted net cash flows expected to result from the use of the assets and their eventual disposition. If the sum of the expected undiscounted cash flow is less than the carrying amount of the assets, the Company would recognize an impairment loss based on the excess of the carrying amount of the asset group over its fair value. Fair value is generally determined by discounting the cash flows expected to be generated by the assets, when the market prices are not readily available for the long-lived assets. No impairment charge was recognized for each of the three years ended December 31, 2012.

(n)

Fair value of financial instruments

The Company’s financial instruments include cash and cash equivalents, restricted cash, accounts receivable, other receivables, short-term bank borrowings, accounts payable, balances with related parties, other payables, and long-term bank borrowings. Other than the long-term bank borrowings, the carrying values of these financial instruments approximate their fair values due to their short-term maturities. The long-term bank borrowings approximate their fair value since they bear interest rates which approximate market interest rates.

The contingent consideration in both cash and shares are initially measured at fair value of the date of acquisitions of the Managed Network Entities, Gehua and Fastweb (Note 4) and subsequently remeasured at the end of each reporting period with an adjustment for fair value recorded to the current period expense. The Company, with the assistance of an independent third party valuation firm, determined the estimated fair value of the contingent consideration in both cash and shares that are recognized in the consolidated financial statements.

(o)

Revenue recognition

The Company hosts customers’ servers and networking equipment, improving the performance, availability and security of their Internet services. The Company also provides managed network services to enable its customers to deliver data across the internet in a faster and more reliable manner through extensive data transmission network and BroadEx smart routing technology.

Consistent with the criteria of Staff Accounting Bulletin No. 104, Revenue Recognition, the Company recognizes revenue from sales of these services when there is a signed sales agreement with fixed or determinable fees, services have been provided to the customer and collection of the resulting customer’s receivable is reasonably assured.

The Company’s services are provided under the terms of a master service agreement, which will typically accompany a one-year term renewal option with the same terms and conditions. Customers can choose at the outset of the arrangement to either use the Company’s services through a monthly fixed fee arrangement or choose a plan based on actual bandwidth or traffic volume used during the month at fixed pre-set rates. The Company recognizes and bills for revenue for excess usage, if any, in the month of its occurrence to the extent a customer’s usage of the services exceeds their pre-set monthly fixed bandwidth usage and fee arrangements. The rates as specified in the master service agreements are fixed for the duration of the contract term and are not subject to adjustment.

The Company may charge its customers an initial set-up fee prior to the commencement of their services. The Company’s records these initial set-up fees as deferred revenue and recognizes revenue ratably over the period of the customer service agreement. Generally, all the Company’s customers’ service agreements will require some amount of initial set-up along with the selected service subscription.

Business tax on revenues earned from provision of services to customers is recorded as a deduction from gross revenue to derive net revenue in the same period in which the related revenue is recognized. Except for Xi’an Tech, which is subject to a 5% business tax rate on their revenues, all the Company’s other PRC subsidiaries and its Consolidated VIE are subject to a 3% business tax rate.

The business tax expenses for the years ended December 31, 2010, 2011 and 2012 amounted to RMB20,519, RMB42,241 and RMB56,106 (US$9,006), respectively.

(p)

Cost of revenues

Cost of revenues consists primarily of telecommunication costs, depreciation of the Company’s long-lived assets, amortization of acquired intangible assets, maintenance, and data center rental expenses directly attributable to the provision of the IDC services.

21Vianet China is subject to business tax and other surcharges on the revenues earned for exclusive business support, technical and consulting services provided to 21Vianet Technology, pursuant to the VIE agreements (Note 1(v)). Such business tax and other surcharges are charged to cost of revenues as the related technical, consulting and rental services are rendered.

(q)

Advertising expenditures

Advertising expenditures are expensed as incurred and are included in sales and marketing expenses, which amounted to RMB3,468, RMB3,159 and RMB 4,426 (US$710) for the years ended December 31, 2010, 2011 and 2012, respectively.

(r)

Research and development expenses

Research and development expenses consist primarily of payroll and related personnel costs for routine upgrades and related enhancements of the Company’s services and network. Research and development expenses are expensed as incurred.

(s)

Government grants

Government grants are provided by the relevant PRC municipal government authorities to subsidize the cost of certain research and development projects. The amount of such government grants are determined solely at the discretion of the relevant government authorities and there is no assurance that the Company will continue to receive these government grants in the future. Government grants are recognized when it is probable that the Company will comply with the conditions attached to them, and the grants are received. When the grant relates to an expense item, it is recognized in the statement of operations over the period necessary to match the grant on a systematic basis to the costs that it is intended to compensate, as a reduction of the related operating expense. When the grant relates to an asset, it is recognized as deferred government grants and released to the statement of operations in equal amounts over the expected useful life of the related asset, when operational, as a reduction of the related depreciation expense.

(t)

Leases

Leases are classified at the inception date as either a capital lease or an operating lease. The Company did not enter into any leases whereby it is the lessor for any of the periods presented. As the lessee, a lease is a capital lease if any of the following conditions exists: a) ownership is transferred to the lessee by the end of the lease term, b) there is a bargain purchase option, c) the lease term is at least 75% of the property’s estimated remaining economic life, or d) the present value of the minimum lease payments at the beginning of the lease term is 90% or more of the fair value of the leased property to the lessor at the inception date. A capital lease is accounted for as if there was an acquisition of an asset and an incurrence of an obligation at the inception of the lease. The Company entered into capital leases for certain fiber optic cables and network equipment in the years ended December 31, 2010, 2011 and 2012.

All other leases are accounted for as operating leases wherein rental payments are expensed on a straight-line basis over the periods of their respective lease terms. The Company leases office space and employee accommodation under operating lease agreements. Certain lease agreements contain rent holidays and escalating rent. Rent holidays and escalating rent are considered in determining the straight-line rent expense to be recorded over the lease term. The lease term begins on the date of initial possession of the lease property for purposes of recognizing lease expense on a straight-line basis over the term of the lease.

(u)

Income taxes

The Company accounts for income taxes using the liability method. Under this method, deferred tax assets and liabilities are determined based on the difference between the financial reporting and tax bases of assets and liabilities using enacted tax rates that will be in effect in the period in which the differences are expected to reverse. The Company records a valuation allowance against deferred tax assets if, based on the weight of available evidence, it is more-likely-than-not that some portion, or all, of the deferred tax assets will not be realized. The effect on deferred taxes of a change in tax rates is recognized in income in the period that includes the enactment date.

The Company applies ASC 740, Accounting for Income Taxes, to account for uncertainty in income taxes. ASC 740 prescribes a recognition threshold a tax position is required to meet before being recognized in the financial statements.

The Company has elected to classify interest and penalties related to unrecognized tax benefits, if and when required, as part of “income tax” in the consolidated statements of operations.

(v)

Discontinued operations

In accordance with ASC 205-20, Discontinued Operations, when a component of an entity has been disposed of and the Company will no longer have significant continuing involvement in the operations of the component, the results of its operations should be classified as discontinued operations in the consolidated statement of operations for all periods presented.

(w)

Share-based compensation

Share options and Restricted Stock Units (“RSUs”) granted to employees are accounted for under ASC 718, Compensation—Stock Compensation, which requires that share-based awards granted to employees be measured based on the grant date fair value and recognized as compensation expense over the requisite service period and/or performance period (which is generally the vesting period) in the consolidated statements of operations.

The Company has elected to recognize compensation expense using the straight-line method for share-based awards granted with service conditions that have a graded vesting schedule. For share-based awards granted with performance conditions, the Company recognizes compensation expense using the accelerated method. The Company commences recognition of the related compensation expense if it is probable for the Company to estimate the fulfillment of the performance condition. To the extent that the Company determines that it is probable that a different number of share-based awards will vest depending on the outcome of the performance condition, the cumulative effect of the change in estimate is recognized in the period of change.

ASC 718 requires forfeitures to be estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from initial estimates. The forfeiture rate is estimated based on historical and future expectations of employee turnover rates and are adjusted to reflect future changes in facts and circumstances, if any.

Share-based compensation expense is recorded net of estimated forfeitures such that expense is recorded only for those share-based awards that are expected to vest. To the extent the Company revises this estimate in the future, the share-based payments could be materially impacted in the period of revision, as well as in following periods. During the years ended December 31, 2010, 2011 and 2012, the Company estimated that the forfeiture rate for both the management and non-management employees of the Company was zero.

(x)

Earnings per share

In accordance with ASC 260, Earnings per Share, basic earnings per share is computed by dividing net earnings / loss attributable to ordinary shareholders by the weighted average number of unrestricted ordinary shares outstanding during the year using the two-class method. Under the two-class method, net income is allocated between ordinary shares and other participating securities based on their participating rights. The Company’s Series A, Series B and Series C contingently redeemable convertible preferred shares were participating securities. For the periods presented herein, the computation of basic earnings per share using the two-class method is not applicable as the participating securities did not have contractual rights and obligations to share in the losses of the Company. Accordingly, both the profit from continuing operations and loss from discontinued operations are allocated to the ordinary shareholders in the computation of basic earnings per share. Diluted earnings per share for continuing operations is calculated by dividing net profit from continuing operations attributable to ordinary shareholders as adjusted for the effect of dilutive ordinary equivalent shares, if any, by the weighted average number of ordinary and dilutive ordinary equivalent shares outstanding during the period. Diluted earnings per share for discontinued operations is then calculated by dividing net loss from discontinued operations attributable to ordinary shareholders by the same number of potential ordinary shares determined in the earlier step. Contingently issuable shares, including performance-based share awards, are included in the computation of basic earnings per share only when there is no circumstance under which those shares would not be issued. Ordinary equivalent shares consist of the ordinary shares issuable upon the conversion of the Company’s preferred shares using the if-converted method and ordinary shares issuable upon the exercise of the share options, using the treasury stock method. Ordinary share equivalents are excluded from the computation of diluted per share if their effects would be anti-dilutive.

(y)

Share repurchase program

Pursuant to a Board of Directors’ resolution on September 14, 2011, the Company’s management is authorized to repurchase up to US$30,000 of the Company’s ADSs (“Share Repurchase Plan”). During the period from September 14, 2011 to December 31, 2011, the Company repurchased 3,022,532 ADSs, under this plan for a consideration of US$29,900. There was no additional repurchase during 2012.

The Company accounted for the repurchased shares as Treasury Stock at cost in accordance to ASC 505-30, Treasury Stock, and is shown separately in the statement of shareholder’s (deficit) equity, as the Company has not yet decided on the ultimate disposition of those ADSs acquired. When the Company decides to use the treasury stock to settle the stock consideration for the acquisitions (Note 17), the difference between the fair value at settlement date and the repurchase price is debited into additional paid-in capital. When the Company decides to retire the treasury stock, the difference between the original issuance price and the repurchase price is debited into additional paid-in capital.

(z)

Comprehensive income (loss)

Comprehensive income (loss) is defined as the increase (decrease) in equity of the Company during a period from transactions and other events and circumstances excluding transactions resulting from investments by owners and distributions to owners. Accumulated other comprehensive loss of the Company includes foreign currency translation adjustments related to the Company, 21Vianet HK, 21V Xi’an Holding, Fastweb Holdings and Fastweb HK, whose functional currency is US$.

(aa)

Segment reporting

The Company’s chief operating decision-maker, who has been identified as the Chief Executive Officer, reviews the consolidated results when making decisions about allocating resources and assessing performance of the Company as a whole and hence, the Company has only one operating and reportable segment. The Company operates and manages its IDC business as a single segment. As the Company’s long-lived assets are substantially all located in the PRC and substantially all the Company’s revenues are derived from within the PRC, no geographical segments are presented.

(bb)

Employee benefits

The full-time employees of the Company’s PRC subsidiaries are entitled to staff welfare benefits including medical care, housing fund, pension benefits and unemployment insurance, which are governmental mandated defined contribution plans. These entities are required to accrue for these benefits based on certain percentages of the employees’ respective salaries, subject to certain ceilings, in accordance with the relevant PRC regulations, and make cash contributions to the state-sponsored plans out of the amounts accrued.

(cc)

Recent accounting pronouncements

In February 2013, the FASB issued ASU No. 2013-02 (“ASU 2013-02”), Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income, which is intended to improve the reporting of reclassifications out of accumulated other comprehensive income. It does not change the current requirements for reporting net income or other comprehensive income in financial statements. However, the standard requires an entity to provide information about the amounts reclassified out of accumulated other comprehensive income by component. For public entities, the amendments are effective prospectively for reporting periods beginning after December 15, 2012, with early adoption permitted. The Company will adopt ASU 2013-02 beginning January 1, 2013 and does not expect the adoption to have a material impact on its consolidated financial statements.

CONCENTRATION OF RISKS

12 Months Ended

Dec. 31, 2012

CONCENTRATION OF RISKS

3.	CONCENTRATION OF RISKS

(a)

Credit risk

Financial instruments that potentially subject the Company to significant concentrations of credit risk consist primarily of cash and cash equivalents, short-term investments, accounts receivable, other receivables and amounts due from related parties. As of December 31, 2011 and 2012, cash and cash equivalents and short-term investments of RMB225,731 and RMB315,340 (US$50,616), respectively, were deposited with major financial institutions located in the PRC, and US$172,195 and US$120,866 (RMB753,010), respectively, were deposited with in major financial institutions located outside the PRC. Management believes that these financial institutions are of high credit quality and continually monitors the credit worthiness of these financial institutions. Historically, deposits in Chinese banks are secure due to the state policy on protecting depositors’ interests. However, China promulgated a new Bankruptcy Law in August 2006 that came into effect on June 1, 2007, which contains a separate article expressly stating that the State Council may promulgate implementation measures for the bankruptcy of Chinese banks based on the Bankruptcy Law. Under the new Bankruptcy Law, a Chinese bank may go into bankruptcy. In addition, since China’s concession to the World Trade Organization, foreign banks have been gradually permitted to operate in China and have been significant competitors against Chinese banks in many aspects, especially since the opening of the Renminbi business to foreign banks in late 2006. Therefore, the risk of bankruptcy of those Chinese banks in which the Company has deposits has increased. In the event of bankruptcy of one of the banks which holds the Company’s deposits, it is unlikely to claim its deposits back in full since it is unlikely to be classified as a secured creditor based on PRC laws.

(b)

Business, supplier, customer, and economic risk

The Company participates in a relatively dynamic and competitive industry that is heavily reliant operation excellence of the services. The Company believes that changes in any of the following areas could have a material adverse effect on the Company’s future financial position, result of operations or cash flows:

(i) Business Risk—Third parties may develop technological or business model innovations that address data centre and network requirements in a manner that is, or is perceived to be, equivalent or superior to the Company’s services. If competitors introduce services that compete with, or surpass the quality, price or performance of the Company’s services, the Company may be unable to renew its agreements with existing customers or attract new customers at the prices and levels that allow the Company to generate reasonable rates of return on its investment.

(ii) Supplier Risk—The Company’s operations are dependent upon bandwidth and cabinet capacity provided by the third-party telecom carriers. There can be no assurance that the Company will be able to secure the cabinet and bandwidth supply from the third-party telecom carriers, neither the Company is adequately prepared for unexpected increases in bandwidth demands by its customers. The communications capacity the Company has leased, include cabinet and bandwidth, may become unavailable for a variety of reasons, such as physical interruption, technical difficulties, contractual disputes, or the financial health of its third-party providers. Any failure of these network providers to provide the capacity the Company requires may result in a reduction in, or interruption of, service to its customers. A significant portion of the Company’s total bandwidth and cabinet resources are purchased from its four largest suppliers, who collectively accounted for 40%, 31% and 23% of the Company’s total bandwidth and cabinet resources for the years ended December 31, 2010, 2011 and 2012, respectively.

(iii) Customer Risk—The success of the Company’s business going forward will rely in part on Company’s ability to continue to obtain and expand business from existing customers while also attracting new customers. The Company has a diversified base of customers covering its services and the revenue from the largest single customer accounted for less than 5% of the Company’s total net revenues in each of the three years ended December 31, 2012. Certain customers are local subsidiaries of a telecommunication carrier in China, which the Company views as separate customers as it negotiates with, maintain and support each of these entities given that each of them has the separate decision-making authority and services procurement budget. None of these customers on a stand-alone basis contributed more than 4% of the Company’s revenues in any given year but in the aggregate, they contributed approximately 32%, 28% and 22% of the Company’s total revenues, in 2010, 2011 and 2012, respectively.

(iv) Political, economic and social uncertainties—The Company’s operations could be adversely affected by significant political, economic and social uncertainties in the PRC. Although the PRC government has been pursuing economic reform policies for more than 20 years, no assurance can be given that the PRC government will continue to pursue such policies or that such policies may not be significantly altered, especially in the event of a change in leadership, social or political disruption or unforeseen circumstances affecting the PRC political, economic and social conditions. There is also no guarantee that the PRC government’s pursuit of economic reforms will be consistent or effective.

(v) Regulatory restrictions—The applicable PRC laws, rules and regulations currently prohibit foreign ownership of companies that provide IDC services, including hosting and managed network services. Accordingly, the Company’s subsidiary, 21Vianet China, is currently ineligible to apply for the required licenses for providing IDC services in China. As a result, the Company operates its IDC services in the PRC through its Consolidated VIE which holds the licenses and permits required to provide IDC services in the PRC. The PRC Government may also choose at anytime to block access to certain website operators which could also materially impact the Company’s ability to generate revenue.

(c)

Currency convertibility risk

The Company transacts substantially all its business in RMB, which is not freely convertible into foreign currencies. On January 1, 1994, the PRC government abolished the dual-rate system and introduced a single rate of exchange as quoted daily by the People’s Bank of China (the “PBOC”). However, the unification of the exchange rates does not imply that the RMB may be readily convertible into US$ or other foreign currencies. All foreign exchange transactions continue to take place either through the PBOC or other banks authorized to buy and sell foreign currencies at the exchange rates quoted by the PBOC. Approval of foreign currency payments by the PBOC or other institutions requires submitting a payment application form together with suppliers’ invoices, shipping documents and signed contracts.

(d)

Foreign currency exchange rate risk

From July 21, 2005, the RMB is permitted to fluctuate within a narrow and managed band against a basket of certain foreign currencies. The appreciation of the RMB against US$ was approximately 3.0%, 4.9% and 0.2% in the years ended December 31, 2010, 2011 and 2012, respectively. While the international reaction to the appreciation of the RMB has generally been positive, there remains significant international pressure on the PRC Government to adopt an even more flexible currency policy, which could result in a further and potentially more significant appreciation of the RMB against the US$.

The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 94-6
-Paragraph 21, 22, 24
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

ACQUISITIONS

12 Months Ended

Dec. 31, 2012

ACQUISITIONS

4.	ACQUISITIONS

Business combinations

The Group completed the following acquisitions in 2012, which have been accounted for as business combinations:

21V Xi’an

On July 2, 2012, the Company through its wholly-owned subsidiary, 21Vianet HK, purchased 21V Xi’an from 21 Vianet Infrastructure Limited, a subsidiary of aBitCool (a related party), for an aggregate cash consideration of RMB15,977, which is net of the pre-existing receivables and payables which were settled between the Company and 21V Xi’an upon acquisition. 21V Xi’an had previously sold cabinets and leased data center space to the Company. The acquisition of 21V Xi’an has been entered into with the intention to expand the Company’s self-built data center and increase the number of cabinets, so that the Company can effectively manage market demand and improve profit margins.

The following table summarizes the estimated fair values of the assets acquired and liabilities assumed as of the date of acquisition:


Net assets acquired	RMB

Current assets		7,284
Property and equipment, net		24,820
Other payables		(2,761	)
Amount due to related parties		(390	)
Deferred tax liability		(2,437	)

Total net assets acquired		26,516
Purchase consideration		15,977

Bargain purchase gain recognized		(10,539	)

The bargain purchase gain represents the excess of the fair value of the identifiable net assets acquired above the consideration transferred. Specifically, the bargain purchase gain relates to the excess of the fair value of the property and equipment over the carrying amount of these assets, which was used to determine the original purchase consideration. The resulting bargain purchase gain has been recorded in other income in the Company’s consolidated statement of operations for the year ended December 31, 2012.

The revenue and net loss of 21V Xi’an since the acquisition date included in the consolidated statement of operations for the year ended December 31, 2012 were nil and RMB2,942, respectively.

Fastweb

As part of the Company’s business expansion strategy into content delivery network (“CDN”) services, the Company acquired 100% equity interests in Fastweb for a total purchase consideration of RMB116,040 on September 9, 2012, as follows:


	RMB
Cash consideration (i)		33,395
Contingent ordinary shares issuance * (ii)		82,645

Total fair value of purchase price consideration		116,040

The Company determined the fair value of the contingent share consideration with the assistance of an independent third party valuation firm.

Details of the purchase consideration are as follows:

(i)

RMB7,502 and RMB 9,373 of the above cash consideration was paid in September and October 2012, respectively. The remaining balance of RMB16,875 of cash consideration has been paid in 2013.

(ii)

The contingent share consideration is determined based on the achievement by Fastweb of certain financial targets in accordance with the sales and purchase agreement for the fiscal years 2012 and 2013 as well as compliance to the terms of the sales and purchase agreement. The above contingent consideration amounts were derived from the Company’s assessment of whether Fastweb will meet the contractually stipulated targets. As the contingent consideration in shares is not considered to be indexed to its own shares since the settlement amount is determined based on the agreed targets, it is liability-classified and is remeasured at the end of each reporting period with an adjustment for fair value recorded to the current period expense. As the contingency with respect to the financial targets for the fiscal year 2012 was resolved, the corresponding portion of the contingent consideration in shares was remeasured on December 31, 2012, with its fair value of RMB41,197 reclassified to additional paid in capital. The remaining contingent consideration related to fiscal 2013 has been recorded in the “Amount due to related parties” balance within the Company’s statement of financial position (Note 23).

The following table summarizes the estimated fair values of the assets acquired and liabilities assumed as of the date of acquisition:


	RMB
Current assets		25,042
Property and equipment, net		11,333
Contract backlog (Note 9)		1,850
Customer relationships (Note 9)		13,500
Supplier relationships (Note 9)		1,955
Platform software (Note 9)		8,900
Deferred tax assets		1,450

Total assets acquired		64,030

Accounts payable		7,237
Current liabilities		13,454
Deferred tax liabilities, non-current		6,551

Total liabilities assumed		27,242

Net assets acquired		36,788
Purchase consideration		116,040

Goodwill		79,252

The revenue and net profit of Fastweb since the acquisition date included in the consolidated statement of operations for the year ended December 31, 2012 were RMB34,356 and RMB6,556, respectively.

The goodwill, which is not tax deductible, is primarily attributable to synergies expected to be achieved from the acquisition.

The estimated useful lives of the intangible assets acquired from Fastweb, including contract backlog, customer relationships, supplier relationships and platform software are 1 year, 7 years, 1 year, and 5 years, respectively.

Unaudited pro forma consolidated financial information

The following unaudited pro forma consolidated financial information for the years ended December 31, 2011 and 2012 are presented as if the acquisitions of 21V Xi’an and Fastweb had occurred at the beginning of the periods presented. These pro forma results have been prepared for comparative purposes only and do not purport to be indicative of what operating results would have been had the acquisition actually taken place on the date indicated. The pro forma adjustments are based on available information and certain assumptions the management believes are reasonable.


	For the year ended December 31
	2011		2012		2012
	RMB		RMB		US$
Net revenue		1,076,518		1,574,918		252,792
Net profit		42,498		49,957		8,019
Earnings per share basic (RMB)		0.06		0.14		0.02

These amounts have been computed after applying the effects of the Company’s accounting policies.

Purchase agreement

In addition to the business combinations completed per above, the Company also signed the following purchase agreement during 2012:

iJoy Holding Limited

As part of the Company’s expansion strategy into CDN services, on September 20, 2012, the Company signed a purchase agreement to acquire a 100% equity interest in iJoy Holding Limited and its subsidiaries (collectively known as “iJoy”), with a maximum purchase consideration of US$22,000. The majority of the purchase consideration is subject to further adjustments based on certain contingent conditions. As of December 31, 2012, the closing conditions of the acquisition of iJoy have not been met and therefore the transfer of the equity interest has not occurred. As such, the Company has not accounted for this business combination in 2012.

In November and December 2012, the Company made two interest-free loans to the existing shareholder of iJoy for US$50 and US$2,000, respectively, both of which expire at the end of November 2013. The aggregate amount of these loans has been classified as in other current assets on the balance sheet as of December 31, 2012. If the acquisition closes before the loans expire, the Company may offset a portion of the purchase consideration in the amount of the loans which have been granted.

Business combinations in 2010 and 2011

The Company completed the following acquisitions in 2010 and 2011, which were accounted for as business combinations:

Managed Network Entities

As a part of the Company’s business expansion strategy into the provision of managed network services that are complementary to its core IDC business, the Company through 21Vianet Beijing, acquired a 51% equity interest in CYSD and ZBXT (collectively, the “Managed Network Entities”) from a related party for a total purchase consideration of RMB172,439 on September 30, 2010, as follows:


	RMB
Cash consideration (i)		50,000
Contingent consideration in cash * (iii)		38,536
Contingent ordinary shares issuance * (iii) and (iv)		75,494
Option to acquire the Company’s ordinary shares * (ii)		15,174
Less: Call option to purchase the remaining 49% equity interest in the Managed Network Entities (ii)		(6,765	)

Total fair value of purchase price consideration		172,439

The Company determined the fair value of the contingent consideration in cash and ordinary shares, the option to acquire the Company’s ordinary shares and the call option with the assistance of an independent third party valuation firm.

Details on the purchase consideration are discussed as follows:

(i)

The cash consideration of RMB50,000 was paid in September 2010.

(ii)

The Company issued an option to the Seller to acquire RMB25,000 of its ordinary shares at a fixed exercise price of US$8.61 per share, exercisable at any time through June 2012. As the option is indexed to the RMB:USD currency index in addition to its own shares, it is liability-classified and is remeasured at the end of each reporting period with an adjustment to fair value recorded to the results of operations with a corresponding credit in the “Amount due to related parties” balance within the Company’s statement of financial position (Note 23).

(iii)

The contingent consideration in both cash and shares are annually determined based on the achievement by the Managed Network Entities of certain financial targets in accordance with the sales and purchase agreement for the fiscal years 2011, 2012 and 2013, as well as the successful negotiation of a country-wide fiber optic lease agreement with a specific third party that is critical to the expansion of their business. The above contingent consideration amounts were derived from the Company’s assessment of whether the Managed Network Entities will meet the certain contractually stipulated targets. Such contingent consideration amounts still outstanding have been recorded in the “Amount due to related parties” balance within the Company’s statement of financial position (Note 23).

(iv)

In accordance with the sales and purchase agreement, if the option to acquire the Company’s ordinary shares per (ii) above is exercised, any contingent consideration payable in shares, if and when the stipulated targets are achieved, would be reduced by the number of shares issued through the exercise of that option. As such, the valuation of the contingent consideration payable in shares represents the fair value of the contingent share consideration payable that is in excess of the shares issuable as discussed in (ii) above. As the contingent consideration in shares is not considered to be indexed to its own shares since the settlement amount is determined based on the agreed targets discussed in (iii) above, it is liability-classified and is remeasured at the end of each reporting period with an adjustment for fair value recorded to the current period expense. As the contingencies with respect to the financial targets for fiscal years 2011 and 2012 were resolved, the corresponding portions of the contingent consideration in shares were remeasured on December 31, 2011 and 2012, respectively, with their fair values reclassified to additional paid in capital.

The agreement also provided a call option that allows the Company to purchase the remaining 49% equity interest in the Managed Network Entities by December 2011 for cash consideration determined using the proportionate amount of the finalized cash consideration for the initial 51% acquisition. As the remaining 49% equity interests is held by only one non-controlling shareholder where the underlying shares of the Managed Network Entities are not publicly traded, the call option is an embedded feature in the Managed Network Entities’ shares, which does not qualify for bifurcation accounting. The fair value of the call option was RMB6,765 was recognized as part of non-controlling interests.

On October 31, 2011 and December 15, 2011, the Company and the Seller entered into a series of supplementary agreements that modified the original sales and purchase agreement as follows:

Removed the restriction to one specified fiber optics third party vendor thus allowing the successful execution of a similar country-wide fiber optic lease agreement with another third party vendor, and exchanged the portion of the original cash contingent consideration to be paid at the successful execution of the country-wide fiber optic lease agreement with share contingent consideration (see below);

ii)

Removed the option to acquire the Company’s ordinary shares; and

iii)

Adjusted certain financial targets determining contingent consideration in both cash and shares.

The terms of supplementary agreements were negotiated and finalized subsequent to the acquisition date, on which the Company had obtained all necessary information, in response to unforeseen events and circumstances which arose subsequent to the acquisition. Accordingly, the Company concluded that the accounting for the supplementary agreement should be separate from that of the business combination. Part of the contingent share consideration that is to be made to the Seller as part of the acquisition of the remaining 49% of the equity interest of Managed Network Entities is extinguished by the original cash contingent consideration to be paid at the successful execution of the country-wide fiber optic lease agreement, as the two fiber optic cables were highly comparable in terms of quality and capacity. Remeasurement of contingent share consideration for the option to acquire the Company’s ordinary shares is no longer required pursuant to the removal of the option.

On December 15, 2011, the Company exercised the option to acquire the remaining 49% equity interest of the Managed Network Entities, as follows:


	RMB
Contingent cash consideration		69,917
Contingent ordinary share issuance		99,251

Total fair value of purchase price consideration		169,168

The consideration in both cash and shares are annually determined based on the achievement by the Managed Network Entities of certain financial targets for the fiscal year 2011, as well as the completion of construction of the country-wide fiber optic. As the contingent consideration in shares is not considered to be indexed to its own shares since the settlement amount is determined based on the agreed targets, it is liability-classified and is remeasured at the end of each reporting period with an adjustment for fair value recorded to the current period expense. The above contingent consideration amounts were derived from the Company’s assessment of whether the Managed Network Entities will meet the certain contractually stipulated targets. Such contingent consideration amounts still outstanding have been recorded in the “Amount due to related parties” balance within the Company’s statement of financial position. As the contingency with respect to the revenue and net profit targets for fiscal year 2011 was resolved, the corresponding portion of the contingent consideration in shares was remeasured on December 31, 2011, with its fair value reclassified to additional paid in capital.

An amount of RMB67,375 of cash consideration was paid in December 2011, with the remaining cash consideration of RMB2,542 paid in May 2012.

Since the Company had already obtained control of Managed Network Entities on September 30, 2010, the acquisition of the remaining 49% equity interests was accounted for as an equity transaction, where the difference between the fair value of the purchase consideration and the carrying amount of non-controlling interest of RMB42,288 was recorded as additional paid-in capital.

Gehua

As a part of the Company’s business expansion strategy into the provision of managed network services that are complementary to its core IDC business, the Company through 21Vianet Beijing, acquired 100% equity interest in Gehua from a related party for a total purchase consideration of RMB 77,469 on October 19, 2011, as follows:


	RMB
Cash consideration (i)		14,820
Contingent consideration in cash * (ii)		15,949
Contingent ordinary shares issuance * (iii)		46,700

Total fair value of purchase price consideration		77,469

The Company determined the fair value of the contingent consideration in cash and ordinary shares with the assistance of an independent third party valuation firm.

Details on the purchase consideration are discussed as follows:

(i)

The cash consideration of RMB14,820 was paid in October 2011.

(ii)

The contingent cash consideration is determined based on the achievement by Gehua of certain financial targets for the period from September 1, 2011 to August 31, 2012. The above contingent consideration amounts were derived from the Company’s assessment of whether Gehua will meet the certain contractually stipulated targets. Such amounts were fully paid by February 2013, as the contingency was resolved in 2012.

(iii)

The contingent consideration in shares is determined based on the achievement by Gehua of certain financial targets in accordance with the sales and purchase agreement for the periods from September 1, 2011 to December 31, 2011, from September 1, 2011 to August 31, 2013 and the operating effectiveness of the fiber optic lease arrangement acquired as part of this acquisition for the period up to August 15, 2014. As the contingent consideration in shares is not considered to be indexed to its own shares since the settlement amount is determined based on the agreed targets, it is liability-classified and is remeasured at the end of each reporting period with an adjustment for fair value recorded to the current period expense. Such contingent consideration amounts still outstanding have been recorded in the “Amount due to related parties” balance within the Company’s statement of financial position. As the contingency with respect to the financial targets for the period from September 1, 2011 to December 31, 2011 has been resolved, the corresponding portion of the contingent consideration in shares was remeasured on December 31, 2011, with its fair value reclassified to additional paid in capital.

Asset acquisitions

On October 1, 2011, the Company through its consolidated VIE, 21Vianet Technology and 21Vianet Beijing, acquired 99.95% and 0.05% equity interests of Shanghai Cloud from Foshan 21Vianet Intelligence Technology Co., Ltd. (“21V FS”) and 21Vianet Beijing Intelligence Energy System Technology Co., Ltd. (“21V BJ”), respectively, for cash consideration of RMB18,200. 21V FS and 21V BJ are both consolidated VIEs of aBitCool. On October 27, 2011, the Company through its consolidated VIE, 21Vianet Beijing, acquired 100% equity interest in Shenzhen Cloud from 21V FS for cash consideration of RMB7,900.

As Shanghai Cloud and Shenzhen Cloud did not possess all the elements that are necessary to conduct normal operations as a business and had not yet commenced operations, such acquisitions were accounted for as acquisitions of assets.

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

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Reference 19: http://www.xbrl.org/2003/role/presentationRef
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ACCOUNTS RECEIVABLE, NET

12 Months Ended

Dec. 31, 2012

ACCOUNTS RECEIVABLE, NET

5.	ACCOUNTS RECEIVABLE, NET

Accounts receivable and the allowance for doubtful accounts consist of the following:


	December 31,
	2011			2012
	RMB			RMB			US$
Accounts receivable		149,745			293,710			47,144
Allowance for doubtful debts		(2,121	)		(341	)		(55	)

		147,624			293,369			47,089

As of December 31, 2011 and 2012, all accounts receivable were due from third party customers.

An analysis of the allowance for doubtful accounts is as follows:


	For the year ended December 31,
	2011			2012
	RMB			RMB			US$
Balance at beginning of the year		2,453			2,121			341
Provision		183			538			86
Write-off of accounts receivable		(515	)		(2,318	)		(372	)

Balance at the end of the year		2,121			341			55

Additions to the Company’s allowance for doubtful accounts were recorded within general and administration expenses for the years ended December 31, 2010, 2011 and 2012.

The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses.

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-Publisher AICPA
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-Article 5

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PREPAID EXPENSES AND OTHER CURRENT ASSETS

SHORT-TERM INVESTMENTS

12 Months Ended

Dec. 31, 2012

SHORT-TERM INVESTMENTS

6.	SHORT-TERM INVESTMENTS

Short-term investments consisted of the following as of December 31, 2011 and 2012:

As of December 31, 2011

Carrying Value

Unrealized
gains/(losses)

Estimated Fair
Value

RMB

Held-to-maturity securities

—Fixed rate time deposits

894,540

—

894,540

As of December 31, 2012

Carrying Value

Unrealized
gains/(losses)

Estimated Fair
Value

RMB

US$

Held-to-maturity securities

—Fixed rate time deposits

222,701

—

222,701

35,746

The Company recorded interest income related to its short-term investments amounting to nil, RMB12,961 and RMB12,708 (US$2,040) for the years ended December 31, 2010, 2011 and 2012, respectively, in the consolidated statements of operations.

PREPAID EXPENSES AND OTHER CURRENT ASSETS

12 Months Ended

Dec. 31, 2012

7.	PREPAID EXPENSES AND OTHER CURRENT ASSETS

Prepaid expenses and other current assets consist of the following:


	December 31,
	2011		2012
	RMB		RMB		US$
Prepaid expenses for bandwidth, rented computer rooms and cabinets		15,478		19,913		3,196
Staff field advances		993		2,530		406
Interest receivable		10,295		6,998		1,123
Loans to shareholder of iJoy (Note 4)		—		12,885		2,068
Receivables for the disposal of certain construction-in-progress		—		20,290		3,257
Tax recoverable		2,140		8,422		1,352
Office deposits		4,612		8,288		1,330
Other receivables		14,057		16,430		2,638

		47,575		95,756		15,370

Prepaid expense for bandwidth, rented computer rooms and cabinets represents the unamortized portion of prepayments made to the Company’s telecommunication operators and certain technology companies, who provide the Company with access to bandwidth and computer rooms and cabinets.

PROPERTY AND EQUIPMENT, NET

12 Months Ended

Dec. 31, 2012

PROPERTY AND EQUIPMENT, NET

8.	PROPERTY AND EQUIPMENT, NET

Property and equipment, including those held under capital leases, consist of the following:


	December 31,
	2011			2012
	RMB			RMB			US$
At cost:

Buildings		11,089			32,035			5,142
Leasehold improvements		55,855			170,519			27,370
Computer and network equipment		431,311			665,040			106,747
Optical fibers		63,094			64,700			10,385
Office equipment		7,257			7,113			1,142
Motor vehicles		343			1,485			238

		568,949			940,892			151,024
Less: Accumulated depreciation		(201,526	)		(296,521	)		(47,595	)

		367,423			644,371			103,429
Construction-in-progress		86,460			178,336			28,625

		453,883			822,707			132,054

Depreciation expense was RMB19,673, RMB58,873 and RMB92,786 (US$14,893) for the years ended December 31, 2010, 2011 and 2012, respectively, and were included in the following captions:


	For the year ended December 31,
	2010		2011		2012
	RMB		RMB		RMB		US$
Cost of revenues		11,863		41,271		69,883		11,217
Sales and marketing expense		777		966		814		130
General and administrative expense		2,071		2,034		2,691		432
Research and development expense		4,962		14,602		19,398		3,114

		19,673		58,873		92,786		14,893

The carrying amounts of the Company’s property and equipment held under capital leases at respective balance sheet dates were as follows:


	December 31,
	2011			2012
	RMB			RMB			US$
Computer and network equipment		80,578			87,272			14,008
Optical fibers		63,094			64,700			10,385

		143,672			151,972			24,393
Less: accumulated depreciation		(15,790	)		(33,115	)		(5,315	)

		127,882			118,857			19,078

Depreciation of computer and network equipment and fiber optic cables under capital leases was RMB3,413, RMB12,094 and RMB15,934 (US$2,558), for the years ended December 31, 2010, 2011 and 2012, respectively.

The carrying amounts of computer and network equipment pledged by the Company to secure banking borrowings (Note 12) granted to the Company at the respective balance sheet dates were as follows:


	December 31,
	2011		2012
	RMB		RMB		US$
Buildings		—		19,381		3,111
Computer and network equipment		20,000		46,320		7,435

The entire disclosure for long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. This disclosure may include property plant and equipment accounting policies and methodology, a schedule of property, plant and equipment gross, additions, deletions, transfers and other changes, depreciation, depletion and amortization expense, net, accumulated depreciation, depletion and amortization expense and useful lives, income statement disclosures, assets held for sale and public utility disclosures.

ACCRUED EXPENSES AND OTHER PAYABLES

INTANGIBLE ASSETS, NET

12 Months Ended

Dec. 31, 2012

INTANGIBLE ASSETS, NET

9.	INTANGIBLE ASSETS, NET

The following table presents the Company’s intangible assets as of the respective balance sheet dates:


	Purchased software			Radio spectrum license			Network use right			Contract backlog*			Customer relationships*			Licenses from acquisition*			Supplier relationships*			Trade names*			Platform software*			Total
	RMB			RMB						RMB			RMB			RMB			RMB			RMB			RMB			RMB
Intangible assets, net January 1, 2011		3,916			—			—			1,905			41,403			1,298			93,519			15,045			—			157,086
Additions		1,020			—			—			910			8,410			100			22,020			—			—			32,460
Disposals		(3	)		—			—			—			—			—			—			—			—			(3	)
Amortization expense		(1,716	)		—			—			(1,913	)		(14,730	)		(90	)		(10,635	)		(1,020	)		—			(30,104	)

Intangible assets, net December 31, 2011		3,217			—			—			902			35,083			1,308			104,904			14,025			—			159,439
Additions		12,217			121,425			20,000			1,850			13,500			—			1,955			—			8,900			179,847
Amortization expense		(1,907	)		(6,119	)		(167	)		(1,223	)		(10,948	)		(95	)		(13,305	)		(1,020	)		(593	)		(35,377	)

Intangible assets, net December 31, 2012		13,527			115,306			19,833			1,529			37,635			1,213			93,554			13,005			8,307			303,909

Intangible assets, net December 31, 2012 (US$)		2,173			18,508			3,183			245			6,041			195			15,016			2,087			1,333			48,781

*	Acquired in the acquisition of SH Guotong, Managed Network Entities, Gehua and Fastweb (Note 4).

In February 2012, the Company obtained a radio spectrum license from the Hong Kong Telecommunications Authority in exchange for a license fee of HK$150,000. This license allows the Company to use a frequency band of 30 MHz in a 2.3 GHz band in order to provide broadband wireless access services in Hong Kong for a period of 15 years.

In November 2012, the Company obtained a network use right from a third party, in exchange for an upfront fee of RMB20,000. This use right allows the Company to use 10Gb of the fiber optic transmission capacity for a period of 20 years.

Customer relationships relate to the relationships that arose as a result of existing customer agreements acquired and is derived from the estimated net cash flows that are expected to be derived from the expected renewal of these existing customer agreements after subtracting the estimated net cash flows from other contributory assets and is estimated to have a useful life of four to eight years. Supplier relationships relate to the relationships that arose as a result of existing bandwidth supply agreements with certain network operators. Except for the supplier relationship in the acquisition of Fastweb which was valued using a replacement cost method given the relative ease of replacement, the values of supplier relationships were generally derived from the estimated net cash flows that are expected to be generated from the expected renewal of these existing supplier agreements after subtracting the estimated net cash flows from other contributory assets. Trade Names relate to the Chinese trade names of SH Guotong and the Managed Network Entities.

The intangible assets, except for acquired customer relationships in the acquisition of the Managed Network Entities which are amortized using an accelerated method of amortization, are amortized using the straight-line method, which is the Company’s best estimate of how these assets will be economically consumed over their respective estimated useful lives ranging from 5 to 20 years. Amortization expenses were approximately RMB11,658, RMB30,104 and RMB35,377 (US$5,678) for the years ended December 31, 2010, 2011 and 2012, respectively.

The annual estimated amortization expenses for the intangible assets for each of the next five years are as follows:


	2013		2014		2015		2016		2017
	RMB		RMB		RMB		RMB		RMB
Purchased software		4,341		3,626		3,503		3,209		2,561
Radio Spectrum License		8,105		8,105		8,105		8,105		8,105
Network use right		1,000		1,000		1,000		1,000		1,000
Contract backlog		1,385		—		—		—		—
Customer relationship		9,568		7,825		6,501		5,432		2,891
Licenses from acquisition		95		95		95		95		95
Supplier relationship		13,093		11,790		11,790		11,790		11,790
Trade names		1,020		1,020		1,020		1,020		1,020
Platform software		1,779		1,779		1,779		1,779		1,191
		40,386		35,240		33,793		32,430		28,653

GOODWILL

12 Months Ended

Dec. 31, 2012

GOODWILL

10.

GOODWILL

Goodwill is comprised of the following:


	December 31,
	2011		2012
	RMB		RMB		US$
Acquisition of SH Guotong		12,507		12,507		2,007
Acquisition of the Managed Network Entities		157,664		157,664		25,307
Acquisition of Gehua		47,265		47,265		7,587
Acquisition of Fastweb		—		79,252		12,721

		217,436		296,688		47,622

The Company has assessed for impairment of its goodwill derived from the acquisitions of SH Guotong, the Managed Network Entities, Gehua and Fastweb. No impairment loss was recognized in any of the years presented.

LONG-TERM INVESTMENTS

12 Months Ended

Dec. 31, 2012

LONG-TERM INVESTMENTS

11.

LONG-TERM INVESTMENTS

The Company’s long-term investments comprise of the following:

Cost method investment

The Company’s cost method investment represents a 10% equity ownership in Telehouse Beijing Co., Ltd. (“BJ Tele”), a foreign investment company established on August 22, 2007 in the PRC by aBitCool, a related party (Note 23(a)), and a third party foreign company. BJ Tele is principally engaged in the business of manufacturing and rental of cabinets.

On September 30, 2011, the Company through its subsidiary, 21 Vianet HK, made a cash investment of RMB8,200 to purchase its 10% equity interest in BJ Tele from aBitCool. There were no indicators of impairment noted for this long-term investment as of December 31, 2012.

Investment in an equity investee

As of December 31, 2011

Increase (decrease) during
the year ended
December 31, 2012

As of December 31, 2012

Cost
investment

Share
equity
income

Investment
in equity
investee

Cost
investment

Share equity
loss

Cost
investment

Share equity
loss

Investment
in equity
investee

RMB

US$

Yizhuang Fund

—

50,500

(1,101

)

50,500

(1,101

)

49,399

7,929

In April 2012, the Company through its subsidiary, 21Vianet Beijing, entered into an agreement to invest in the Yizhuang Venture Investment Fund (“Yizhuang Fund”) as a limited partner, and holds 27.694% of the investee. Given the Company holds more than three percent interest in the Yizhuang Fund as a Limited Partner, the investment is accounted for under the equity method as prescribed in ASC323-10, Investments—Equity Method. During the year ended December 31, 2012, the Company invested RMB50,500 in Yizhuang Fund. A second investment outlay of RMB50,500 will be made upon the written notice of Yizhuang Fund.

BANK BORROWINGS

12 Months Ended

Dec. 31, 2012

BANK BORROWINGS

12.

BANK BORROWINGS

Bank borrowings are as follows as of the respective balance sheet dates:


	As of December 31,		As of December 31,
	2011		2012		2012
	(RMB)		(RMB)		(US$)
Short-term borrowings		100,000		176,961		28,404
Long-term borrowings, current portion		—		167,879		26,946

		100,000		344,840		55,350
Long-term borrowings, non-current portion		—		63,000		10,112

Total bank borrowings		100,000		407,840		65,462

The short-term bank borrowings outstanding as of December 31, 2011 and 2012 bore a weighted average interest rate of 6.76% and 7.66% per annum, respectively, and were denominated in RMB. These borrowings were obtained from financial institutions and have terms of two months to one year.

The long-term bank borrowings (including current portion) outstanding as of December 31, 2012 bear an average interest rate of 8.35% per annum, and are denominated in Renminbi. These loans were obtained from financial institutions located in the PRC.

The current and non-current portions of long-term bank borrowings as of December 31, 2012 will be due in installments between the periods of May 25, 2013 to May 25, 2015, as follows:


	RMB		US$
2013		167,879		26,946
2014		13,000		2,086
2015		50,000		8,026

		230,879		37,058

As of December 31, 2011 and December 31, 2012, unused loan facilities for short-term bank borrowings and long-term bank borrowings amounted to RMB10,000 and RMB247,726 (US$39,763), respectively.

Bank borrowings as of December 31, 2011 and 2012 were secured/guaranteed by the following:

December 31, 2011


Short-term borrowings		Secured/guaranteed by
(RMB)
	30,000	Jointly guaranteed by (i) a third party guarantor and (ii) the Company’s computer and network equipment with net book value of RMB20,000 (Note 8). Mr. Chen Sheng, Director and CEO of the Company and Mr. Zhang Jun, Director and COO of the Company, also provided a guarantee to the third party guarantor for this bank borrowing with an upper limit of RMB12,000.
	30,000	Guaranteed by a third party guarantor.
	30,000	Jointly guaranteed by Mr. Chen Sheng, Director and CEO of the Company and Mr. Zhang Jun, Director and COO of the Company.
	10,000	Unsecured loan.

	100,000

December 31, 2012


Short-term borrowings		Secured/guaranteed by
(RMB)
	20,000	Jointly guaranteed by (i) a third party guarantor and (ii) the Company’s computer and network equipment with a net book value of RMB25,720 (Note 8). Mr. Chen Sheng, Director and CEO of the Company and Mr. Zhang Jun, Director and COO of the Company, also provided a guarantee to the third party guarantor with an upper limit of RMB20,000.
	30,000	Jointly guaranteed by (i) a third party guarantor and (ii) the Company’s computer and network equipment with net book value of RMB20,600 (Note 8). Mr. Chen Sheng, Director and CEO of the Company and Mr. Zhang Jun, Director and COO of the Company, also provided a guarantee to the third party guarantor with an upper limit of RMB30,000.
	30,000	Jointly guaranteed by (i) a third party guarantor and (ii) the Company’s property with a net book value of RMB19,381 (Note 8). Mr. Chen Sheng, Director and CEO of the Company and Mr. Zhang Jun, Director and COO of the Company, also provided a guarantee to the third party guarantor with an upper limit of RMB30,000.
	90,000	Jointly guaranteed by Mr. Chen Sheng Director and CEO of the Company and Mr. Zhang Jun, Director and COO of the Company.
	6,961	Jointly guaranteed by (i) Mr. Chen Sheng Director and CEO of the Company and Mr. Zhang Jun, COO of the Company, and (ii) restricted cash of RMB766.

	176,961


Long-term borrowings (including current portion)		Secured/guaranteed by
(RMB)
	63,000	Guaranteed by restricted cash of RMB100,000.
	167,879	Guaranteed by restricted cash of RMB190,000.

	230,879

ACCRUED EXPENSES AND OTHER PAYABLES

12 Months Ended

Dec. 31, 2012

13.

ACCRUED EXPENSES AND OTHER PAYABLES

The components of accrued expenses and other payables are as follows:


	December 31,
	2011		2012
	RMB		RMB		US$
Payroll and welfare payable		20,486		23,395		3,756
Business and other taxes payable		58,640		52,368		8,406
Payables for office supplies and utilities		2,248		2,424		390
Payables for the purchase of property and equipment		33,273		50,648		8,131
Payables for the purchase of software		426		307		50
Payable for purchase of network use right (Note 9)		—		19,881		3,191
Accrued service fees		5,316		12,248		1,966
Others		3,937		6,227		1,000

		124,326		167,498		26,890

CAPITAL LEASE OBLIGATIONS

12 Months Ended

Dec. 31, 2012

CAPITAL LEASE OBLIGATIONS

14.

CAPITAL LEASE OBLIGATIONS

Certain computer and network equipment and fiber optic cables were acquired through capital leases entered into by the Company. Future minimum lease payments under non-cancellable capital lease arrangements are as follows:


	RMB			US$
2013		42,151			6,766
2014		30,862			4,954
2015		25,497			4,093
2016		712			114
2017 and thereafter		890			143

Total minimum lease payments		100,112			16,070
Less: amount representing interest		(11,041	)		(1,773	)

Present value of remaining minimum lease payments		89,071			14,297

Capital leases had weighted average interest rates of 7.56% and 7.93% for the years ended December 31, 2011 and 2012, respectively.

DEFERRED GOVERNMENT GRANTS

12 Months Ended

Dec. 31, 2012

DEFERRED GOVERNMENT GRANTS

15.

DEFERRED GOVERNMENT GRANTS

During the years ended December 31, 2011 and 2012, the Company received RMB1,000 and RMB15,850 (US$2,544), respectively, in government grants from the relevant PRC government authorities. The government grants received during the year ended December 31, 2011 and 2012 are required to be used in construction of property and equipment. These grants are initially deferred and subsequently recognized in the statement of operations when the Company has complied with the conditions or performance obligations attached to the related government grants, if any, and the grants are no longer refundable. Grants that subsidize the construction cost of property and equipment are amortized over the life of the related assets as a reduction of the associated depreciation expense.

Movements of deferred government grants are as follows:


	For the year ended December 31,
	2011			2012
	RMB			RMB			US$
Balance at beginning of the year		5,400			5,819			934
Additions		1,000			15,850			2,544
Recognized in income as a reduction of depreciation expense		(581	)		(2,876	)		(462	)

Balance at end of the year		5,819			18,793			3,016

PREFERRED SHARES

12 Months Ended

Dec. 31, 2012

PREFERRED SHARES

16.

PREFERRED SHARES

Series A and Series B Preferred Shares

As discussed in Note 1, on October 31, 2010, as part of the reorganization, the Company issued an aggregate of 41,408,340 Series A contingently redeemable convertible preferred shares (“Series A Preferred Shares”) and 69,557,840 Series B contingently redeemable convertible preferred shares (“Series B Preferred Shares”), which the number of the shares issued was determined by applying the relative fair value of the IDC and Non-IDC Business of which the relative percentages are determined to be 85% and 15% respectively, to the outstanding number of preferred shares of aBitCool. The initial carrying values of the Company’s preferred shares were based on their estimated fair values on their issuance date. Given there was no change in each shareholder’s proportionate shareholdings and respective rights and obligations before and after the reorganization, the reorganization was deemed to lack substance and accounted for in a manner similar to a pooling-of interest. Accordingly, the accompanying consolidated financial statements have been prepared as if the current corporate structure had been in existence throughout the periods presented. Accordingly, the Company’s preferred shares are pushed back to all periods presented.

The details of the Series A1, A2, A3, B1 and B2 Preferred Shares are as follows:

(i)

30,411,130 Series A1 Preferred Shares to a group of third party investors, were also the original holders of the Series A1 contingently redeemable convertible preferred shares of aBitCool, at a stated issuance price of US$0.45 for no consideration.

(ii)

5,944,580 Series A2 Preferred Shares to a third party investor, were also the holders of the original Series A2 contingently redeemable convertible preferred shares of aBitCool, at a stated issuance price of US$0.77 for no consideration.

(iii)

5,052,630 Series A3 Preferred Shares to the holder of above Series A2 Preferred Shares, who is also the holder of the original Series A3 contingently redeemable convertible preferred shares of aBitCool at a stated issuance price of US$0.51 for no consideration.

(iv)

10,947,370 Series B1 Preferred Shares to certain holders of above Series A1 Preferred Shares, who are also the holders of the original Series B1 redeemable convertible preferred shares of aBitCool, at a stated issuance price of US$0.51 for no consideration.

(v)

58,610,470 Series B2 Preferred Shares to a group of third party investors, who are also the holders of the original Series B2 redeemable convertible preferred shares of aBitCool, at a stated issuance price of US$0.63 for no consideration.

The following key terms and conditions of the Series A and Series B Preferred Shares are identical to the original preferred share issues by aBitCool:

Voting

The holder of each class of Series A and Series B Preferred Share is entitled to voting rights equal to the ordinary shareholders on an as converted basis. Preferred shareholders are entitled to vote on any matter subject to ordinary shareholder voting.

Dividends

The holders of the Series A and Series B Preferred Shares are entitled to receive dividends when and if declared by the Board of Directors on an as-converted basis prior to payment of any dividend with respect any ordinary shares of the Company. No dividends will be paid to ordinary shareholders of the Company, until a dividend (if declared) is paid in full to holders of the Series A and Series B Preferred Shares on an if-converted basis.

Liquidation

In the event of any liquidation, dissolution or winding up of the Company (each a “Liquidation Event”), either voluntary or involuntary, or the occurrence of a Deemed Liquidation Event defined as (a) the sale, lease, other disposition of all or substantially all of the Company’s assets or the sale, exchange or transfer of a majority of the outstanding share capital of the Company, to an entity or a group of entities acting in concert; or (b) a merger, consolidation, amalgamation, recapitalization, reclassification, reorganization or similar business combination transaction involving the Company under circumstances in which the existing shareholders cease to retain a majority in voting power of the Company, distributions to the shareholders of the Company shall be made in the following manner:

(1)

In the event where the valuation of the Company is more than the sum of the stated issuance prices of the Series A1 Preferred Shares and all the Series B Preferred Shares:

(a)

the holders of Series B Preferred Shares shall be entitled to receive the amount equal to 100% of its stated issuance price plus all declared but unpaid dividends, prior and in preference to any distribution of any of the assets and funds of the Company to the holders of Series A Preferred Shares and ordinary shareholders of the Company;

(b)

After payment has been made to the holders of Series B Preferred Shares, the holders of Series A Preferred Shares shall be entitled to receive the amount equal to 100% of its stated issuance price plus all declared but unpaid dividends, prior and in preference to any distribution of any of the assets and funds of the Company to the ordinary shareholders of the Company;

(c)

After payment has been made to the holders of Series A and Series B Preferred Shares, all assets and funds of the Company that remain legally available for distribution shall be distributed pro rata among the ordinary shareholders and the holders of Series A and Series B Preferred Shares, on an as converted basis.

(2)

In the event where which the valuation of the Company is less than the sum of the stated issuance price of all the Series A1 and Series B Preferred Shares:

(a)

the holders of Series A and Series B Preferred Shares shall be entitled to receive, on parity with each other, an amount equal to 100% of its respective stated issuance price plus all declared but unpaid dividends and distribution, prior and in preference to any distribution of any of the assets and funds of the Company to the ordinary shareholders of the Company;

(b)

If the total consideration from a Liquidation Event results in a valuation of the Company of less than three times of the stated issuance price of the Series B2 Preferred Shares, the holders of Series A and Series B Preferred Shares and the ordinary shareholders shall receive such payment on a pro rata basis in proportion to the number of shares on an as-converted basis held by each such holder.

Redemption

At any time after December 1, 2012, the Series B Preferred Shares shall be redeemable at the option of each holder of the Series B Preferred Shares, at a redemption price equal to 120% of the stated issuance price, plus all declared but unpaid dividends, proportionally adjusted for any recapitalizations, share combinations, share dividends, share splits.

Conversion

Each class of Series A and Series B Preferred Share is convertible, at the option of the holder, at any time into an ordinary share as determined by the quotient of the stated issuance price and the then-effective conversion price. The initial conversion price and conversion ratio is the stated issuance price of each class of Series A and Series B Preferred Shares and one-for-one, respectively.

The above conversion prices are subject to adjustments in the event that the Company issues additional ordinary shares or additional deemed ordinary shares through options or convertible instruments for a consideration per share received by the Company (net of any selling concessions, discounts or commissions) less than the original Series A and Series B Preferred Shares conversion prices, as the case may be, in effect on the date of and immediately prior to such issue. In such event, the Series A and Series B conversion price is reduced, concurrently with such issue, to a price as adjusted according to an agreed-upon formula. The above conversion prices are also subject to adjustments on a proportional basis upon other dilution events.

Prior to the completion of a Qualified IPO, both Series A and Series B Preferred Shares will be automatically converted to ordinary shares at the respective then-effective conversion prices, upon the vote of the (i) holders of not less than 51% of all outstanding Series A Preferred Shares and (ii) holders of not less than 51% of all outstanding Series B Preferred Shares.

On October 31, 2010, in preparation for the Qualified IPO, the shareholders and Board of Directors of the Company approved certain resolutions which only become effective upon the closing of a Qualified IPO effecting certain amendments to the authorized and issued share capital of the Company (Note 1(b)(v)), whereby all Series A and Series B Preferred Shares will be automatically converted into Class B ordinary shares at the respective then-effective conversion prices immediately prior to the completion of a Qualified IPO.

Registration Rights

The Series A and Series B Preferred Shares also contained registration rights which: (1) allowed the holders to demand the Company to file a registration statement covering the offer and sale of Series A and Series B Preferred Shares after a qualified IPO; (2) required the Company to offer preferred shareholders an opportunity to include in a registration if the Company proposes to file a registration statement for a public offering of other securities; (3) allowed the preferred shareholders to request the Company to file a registration statement on Form F-3 when the Company is eligible to use Form F-3. The Company was required to use its best effort to effect the registration if requested by the Preferred Shares holders, but there was no requirement to pay any monetary or non-monetary consideration for non-performance.

Series C Preferred Shares

On January 14, 2011, the Company issued an aggregate of 31,882,930 Series C1 Preferred Shares to certain holders of the Series A and Series B Preferred Shares, for total gross cash proceeds of US$30,000. On February 17, 2011, the Company issued an additional 5,313,820 Series C1 Preferred Shares to a third party investor, for gross cash proceeds of US$5,000.

Upon the issuance of the Series C1 Preferred Shares, the ranking of the Series A and Series B Preferred Shares to dividends and liquidation was modified such that the Series C1 Preferred Shares will rank senior to that of the Series A and Series B Preferred Shares. The redemption of the Series B Preferred Shares was also modified from December 1, 2012 to December 1, 2014 to be consistent with that of the Series C Preferred Shares while all other remaining key terms and conditions of the Series C1 Preferred Shares being identical to those of the Series A and Series B Preferred Shares.

Accounting for Series A, B and C Preferred Shares

The Series A Preferred Shares were initially classified as mezzanine equity as these preferred shares are redeemable contingent upon the occurrence of a conditional event (i.e. Deemed Liquidation Event). The Series B and C1 Preferred Shares were initially classified as mezzanine equity as these preferred shares may be redeemed at the option of the holders on or after an agreed upon date.

The initial carrying values of the Series A and Series B Preferred Shares were based on the estimated fair values at issuance date. The Company determined the estimated fair values of the preferred shares with the assistance of an independent third party valuation firm. The initial carrying values of the Series C1 Preferred Shares were based on the total consideration received.

The holders of Series A, Series B and Series C1 Preferred Shares have the ability to convert the instrument into the Company’s ordinary shares. The Company evaluated the embedded conversion option in these convertible preferred shares to determine if there were any embedded derivatives requiring bifurcation and to determine if there were any beneficial conversion features.

The conversion options and the contingent redemption options of Series A, Series B and Series C1 Preferred Shares do not qualify for bifurcation accounting because the underlying ordinary shares are not publicly traded nor are they readily convertible into cash. There are no other embedded derivatives that are required to be bifurcated.

Beneficial conversion features (“BCF”) exist when the conversion price of the preferred shares is lower than the fair value of the ordinary share at the commitment date. Since the preferred shares are convertible from inception but contains conversion terms that change upon the occurrence of a future event, the contingent beneficial conversion feature is measured at the commitment date but not recognized until the contingency is resolved. The Company determined the estimated fair value of the ordinary share with the assistance from an independent third party valuation firm.

On October 31, 2010, the commitment date, the effective conversion price, which is the estimated fair value per preferred share at issuance date, used to measure the BCF for Series A1, Series A2, Series A3, Series B1 and Series B2 Preferred share were US$1.28, US$1.31, US$1.28, US$1.34 and US$1.37, respectively. No BCF was recognized as the estimated fair value per ordinary share at the commitment date was US$1.24, which was less than the respective effective conversion prices.

No accretion is recorded for the Series B Preferred Shares as their respective initial carrying values recorded are greater than the redemption price of Series B1 and Series B2 Preferred Shares of US$0.61 and US$0.76, respectively.

The effective conversion price used to measure the BCF for Series C1 Preferred Shares on the commitment dates of January 14, 2011 and February 17, 2011 was US$0.94. The Company recorded a BCF of US$9,662 and US$2,051 for the Series C1 Preferred Shares as the fair values per ordinary share on the commitment dates, were US$1.24 and US$1.33, respectively. The discount from recording such BCF was immediately accreted in full as the earliest conversion date is also the issuance date and was treated as a return to the Series C1 Preferred Shareholders.

Upon the Company’s IPO on April 21, 2011, all Series A, Series B and Series C1 Preferred Shares were automatically converted into Class B ordinary shares.

TREASURY STOCK

12 Months Ended

Dec. 31, 2012

TREASURY STOCK

17.

TREASURY STOCK

During 2011, the Company repurchased 3,022,532 ADSs under the Share Repurchase Plan for a total consideration of approximately US$29,918. In December 2011, 350,000 ADSs were issued to the seller of the Managed Network Entities as part of the stock consideration owed to purchase the 49% equity interest of the Managed Network Entities.

In April 2012, 998,607 ADSs, 932,829 ADSs and 316,803 ADSs were issued to the sellers of the Managed Network Entities and Gehua as part of the stock consideration owed to purchase the 51% equity interest of the Managed Network Entities, 49% equity interest of the Managed Network Entities and the 100% equity interest of Gehua, respectively.

In December 2012, an additional 95,000 ADSs were issued to the seller of the Managed Network Entities as part of the stock consideration owed to purchase the 51% equity interest of Managed Network Entities.

STATUTORY RESERVES

12 Months Ended

Dec. 31, 2012

STATUTORY RESERVES

18.

STATUTORY RESERVES

Under PRC law, the PRC subsidiaries of the Company are required to provide for certain statutory reserves, namely a general reserve, an enterprise expansion fund and a staff welfare and bonus fund. The entities are required to allocate at least 10% of their after tax profits on an individual company basis as determined under PRC GAAP to the general reserve and have the right to discontinue allocations to the general reserve if such reserve has reached 50% of registered capital. Appropriations to the enterprise expansion fund and staff welfare and bonus fund are at the discretion of the Board of Directors of the entity. These reserves can only be used for specific purposes and are not transferable to the Company in the form of loans, advances, or cash dividends.

As of December 31, 2011 and 2012, the Company’s PRC Subsidiaries had appropriated RMB15,837 and RMB25,871 (US$4,153), respectively, in its statutory reserves.

MAINLAND CHINA EMPLOYEE CONTRIBUTION PLAN

12 Months Ended

Dec. 31, 2012

MAINLAND CHINA EMPLOYEE CONTRIBUTION PLAN

19.

MAINLAND CHINA EMPLOYEE CONTRIBUTION PLAN

As stipulated by the regulations of the PRC, full-time employees of the Company in the PRC participate in a government-mandated multiemployer defined contribution plan organized by municipal and provincial governments. Under the plan, certain pension benefits, medical care, unemployment insurance, employee housing fund and other welfare benefits are provided to employees. The Company is required to make contributions to the plan based on certain percentages of employees’ salaries. The total expenses for the plan were RMB9,743, RMB17,499 and RMB29,015 (US$4,657), respectively, for the years ended December 31, 2010, 2011 and 2012.

The entire disclosure for pension and other postretirement benefits.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-URI http://asc.fasb.org/topic&trid=2235017

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Implementation Guide (Q and A)
-Number FAS88
-Paragraph 63
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 106
-Paragraph 518
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph a
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-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 03-2
-Paragraph 8
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 264
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph q
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
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Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 8
-Subparagraph m
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Number 132R
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 158
-Paragraph 7, 21, 22
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-Number 30
-Paragraph 26
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SHARE BASED COMPENSATION

12 Months Ended

Dec. 31, 2012

SHARE BASED COMPENSATION

20.

SHARE BASED COMPENSATION

Share based awards granted to employees

In order to provide additional incentives to employees and to promote the success of the Company’s business, the Company adopted a share incentive plan in 2010 (the “2010 Plan”). Under the 2010 Plan, the Company may grant options and RSUs to its employees, directors and consultants to purchase an aggregate of no more than 38,307,310 ordinary shares of the Company. The 2010 Plan was approved by the Board of Directors and shareholders of the Company on July 16, 2010. The maximum aggregate number of ordinary shares to be issued under 2010 Plan was subsequently amended to 36,585,630, as approved by the Board of Directors and shareholders of the Company on January 14, 2011, and then amended to a maximum of 39,272,595 shares as approved by the Board of Directors on July 6, 2012.

The 2010 Plan is administered by the Board of Directors or the Compensation Committee of the Board as set forth in the 2010 Plan (the “Plan Administrator”). All options to be granted under the 2010 Plan have a contractual term of ten years and generally vest over 3 to 4 years in the grantee’s option agreement.

On July 16, 2010, the Company granted 24,078,670 options to employees at exercise price of US$0.15 which had a vesting commencement date of either: (i) July 1, 2008 for employees who joined the Company prior to this date or (ii) the grant date for employees who joined the Company after July 1, 2008. For the options with vesting commencement dates that preceded the grant date, compensation cost related to share options that were vested upon grant date was recognized immediately on the grant date. The compensation cost related to remaining unvested share options shall be recognized over the remaining requisite service period.

In addition to the granting of share options with service conditions, the Company granted 1,964,424 share options in 2011 and 2,524,932 share options and 432,910 RSUs in 2012 with performance conditions whereby a predetermined number will vest upon the assignment of an annual performance review rating in accordance with predetermined performance targets for the grantees over a four-year period. As it is probable for the Company to estimate the annual performance review ratings for the individual grantees, the Company commenced recognition of the related compensation expense using the accelerated method.

The compensation cost related to remaining unvested share options shall be recognized over the remaining requisite service period or the performance review period. As of December 31, 2012, options to purchase 17,898,396 of ordinary shares were outstanding and options to purchase 3,258,737 ordinary shares were available for future grant under the 2010 Plan.

The following table summarized the Company’s employee share option activity under the 2010 Plan:


	Number of options			Weighted average exercise price		Weighted average remaining contractual term		Aggregate intrinsic value
				(US$)		(Years)		(US$)
Outstanding, January 1, 2012		18,180,898			0.24		7.2		23,425
Granted		3,829,830			0.54
Exercised		(3,128,472	)		0.17
Forfeited		(983,860	)		0.89

Outstanding, December 31, 2012		17,898,396			0.28		6.9		23,571

Vested and expected to vest at December 31, 2012		17,898,396			0.28		6.9		23,571

Exercisable as of December 31, 2012		11,715,639			0.19		6.3		16,485

The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying awards and the estimated fair value of the underlying stock at each reporting date, for those awards that have an exercise price below the estimated fair value of the Company’s shares. As of December 31, 2011 and 2012, the Company had options outstanding to purchase an aggregate of 18,180,898 shares and 17,898,396 shares with an exercise price below the estimated fair value of the Company’s shares, resulting in an aggregate intrinsic value of RMB147,435 and RMB146,850 (US$23,571), respectively.

For share options granted before September 30, 2011, the fair value of each share option grant was estimated on the date of grant using the Black-Scholes option pricing model. For share options granted after September 30, 2011, the fair value of each award is estimated on the date of grant using a binomial-lattice option valuation model. The binomial-lattice model considers characteristics of fair value option pricing that are not available under the Black-Scholes. Similar to the Black-Scholes model, the binomial-lattice model takes into account variables such as volatility, dividend yield, and risk-free interest rate. However, in addition, the binomial-lattice model considers the contractual term of the option, the probability that the option will be exercised prior to the end of its contractual life, and the probability of termination or retirement of the option holder in computing the value of the option. For these reasons, the Company believes that the binomial-lattice model provides a fair value for its share based compensation plans that are more representative of actual experience and future expected experience that the value calculated in previous years using the Black-Scholes model.

The Company calculated the estimated fair value of the share options on the grant date using the Black-Scholes Option model or Binomial-Lattice model for 2010, 2011 and 2012, respectively, with the following assumptions:

Granted in 2010

Granted in 2011

Granted in 2012

Before September 30,
2011

After September 30,
2011

Risk-free interest rates

1.41%-2.35%

1.03%-3.36%

2.06%-3.68%

Expected life (years)

0.71-4.04 years

0.08-7.75 years

Not applicable

Sub optimal early exercise factor

Not applicable

2.2

Expected volatility

40.14%-67.24%

24.25%-76%

69.17%

57.01%-68.03%

Expected dividend yield

Fair value of share option

US$0.83

US$1.20-US$2.06

US$1.02-US$1.03

US$1.34-US$1.68

The aggregate fair value of the outstanding options at the grant date was determined to be RMB119,532 (US$19,186) and such amount is recognized as compensation expense using the straight-line method for all employee share options granted with graded vesting based on service conditions and the accelerated method for share options granted with graded vesting based on performance conditions. The weighted-average grant-date fair value of options granted during the years ended December 31, 2010, 2011 and 2012 was US$0.15, US$1.54 and US$1.49, respectively. The total fair value of shares vested during the years ended December 31, 2010, 2011 and 2012 was US$26,842, US$9,804 and US$9,097, respectively. The aggregate intrinsic value of options exercised during the years ended December 31, 2010, 2011 and 2012 was nil, US$14,061, and US$4,487, respectively.

As of December 31, 2012, there was RMB38,086 of unrecognized share-based compensation cost, net of estimated forfeitures, related to unvested options which is expected to be recognized over a weighted-average period of 0.6 year. Total unrecognized compensation cost may be adjusted for future changes in estimated forfeitures.

The following table summarizes the Company’s RSU activity (including RSUs with performance conditions) under the 2010 Plan:


	Number of RSUs			Weighted-average grant date fair value		Weighted-average remaining contractual life		Aggregate intrinsic value
				(US$)		(Years)		(US$)
Unvested, January 1, 2012		—			—
Granted		812,187			10.27
Vested		(107,582	)		11.01
Forfeited		(18,762	)		11.31

Unvested, December 31, 2012		685,843			10.12		9.4		1,098

Share-based compensation cost for RSUs is measured based on the closing fair market value of the Company’s common stock on the date of grant. The aggregate fair value of the unvested RSUs as of December 31, 2012 was US$1,098, and such amount is recognized as compensation expense using the straight-line method for the RSUs with graded vesting based on service conditions and the accelerated method for the RSUs with graded vesting based on performance conditions. As of December 31, 2012, there was US$5,713 of unrecognized share-based compensation cost related to RSUs which is expected to be recognized over a weighted-average vesting period of 3.3 years. Total unrecognized compensation cost may be adjusted for future changes in estimated forfeitures.

Total compensation expense relating to options and RSUs granted to employees recognized for the years ended December 31, 2010, 2011 and 2012 is as follows:


	For the year ended December 31,
	2010		2011		2012
	RMB		RMB		RMB		US$
Cost of revenues		4,645		2,157		4,517		725
Sales and marketing expenses		11,884		5,763		10,508		1,687
General and administration expenses		48,899		31,420		47,749		7,664
Research and development expenses		6,416		2,619		4,858		780

		71,844		41,959		67,632		10,856

(b)

Fully vested ordinary shares to the CEO of the Company

On December 31, 2010, in recognition of his past service contributions, the Company issued 24,826,090 fully vested ordinary shares to Sunrise Corporate Holding Ltd. (“Sunrise”), a company owned by Mr. Chen Sheng, the chief executive officer of the Company, for cash consideration equal to their per share par value of US$0.00001. Accordingly, the Company recorded share-based compensation expense on the date of issuance of these shares to Sunrise equal to the estimated fair-value of the ordinary shares at the measurement date which was determined to be RMB206,037 (US$31,217) or US$1.234 per ordinary share, which was recorded in general and administrative expenses.

Subsequently, in July 2012, the Company repurchased 2,686,965 shares from Sunrise at par value, for the purpose of increasing the maximum aggregate number of shares available for grant under the 2010 share incentive plan by the same amount.

Although neither Sunrise nor the Company’s chief executive officer has any contractual obligation to do so, Sunrise may at its sole discretion, at a future date, transfer a portion of these shares to existing employees of the Company and former employees of the Company’s Non-IDC business that was discontinued and disposed of by the Company. Any share-based shareholder contribution, if and when made by the Company’s chief executive officer through Sunrise for the benefit of the Company, would be required to be pushed down and recognized as share-based compensation expense within the Company’s results of operations in accordance to ASC 718, which would be derived by determining the estimated fair value of the ordinary share award on the transfer date.

As of December 31, 2012, Sunrise did not transfer any of these shares to existing employees of the Company and former employees of the Company’s Non-IDC Business that was previously discontinued and disposed of by the Company.

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 50
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 40
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph 64, 65, A240
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 93-6
-Paragraph 53
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

TAXATION

12 Months Ended

Dec. 31, 2012

TAXATION

21.

TAXATION

Enterprise income tax

Cayman Islands

The Company and Fastweb Holdings are tax-exempt companies incorporated in the Cayman Islands. The Company conducts substantially all of its business through its PRC subsidiary and its VIE and its subsidiaries located in the PRC.

British Virgin Islands

21V Xi’an Holding is a tax-exempt company incorporated in the British Virgin Islands.

Hong Kong

21Vianet HK and Fastweb HK are incorporated in Hong Kong and are subject to Hong Kong profits tax rate of 16.5% for the years ended December 31, 2010, 2011 and 2012. No provision for Hong Kong profits tax has been made in the consolidated financial statements as these entities had no assessable profits in the years ended December 31, 2010, 2011 and 2012.

The PRC

21Vianet China, 21Vianet Technology, Xi’an sub, and 21Vianet Beijing and its subsidiaries are registered in the PRC and subject to PRC enterprise income tax (“EIT”) on the taxable income in accordance with the relevant PRC income tax laws.

On March 16, 2007, the National People’s Congress enacted the Enterprise Income Tax Law (“the New EIT Law”), effective on January 1, 2008. The New EIT Law unified the previously-existing separate income tax laws for domestic enterprises and foreign invested enterprises (“FIEs”) and adopted a unified 25% enterprise income tax rate applicable to all resident enterprises in China, except for certain entities eligible for preferential tax rates and grandfather rules stipulated by the New EIT Law.

In April 2009, 21Vianet Beijing received an approval for the grandfathering of the 6-year tax holiday which effectively commenced from January 1, 2006 and allows the Company to utilize a three-year 100% exemption followed by a three-year half-reduced EIT rate. As a result, 21Vianet Beijing was allowed to use a half-reduced EIT rate for 2009, 2010 and 2011. In December 2008, 21Vianet Beijing also received an approval as a High and New Technology Enterprises (“HNTE”) and is eligible for a 15% preferential tax rate effective from 2008 to 2010 and thereafter for an additional 3 years if it is able to satisfy the technical and administrative requirements in these 3 years. The Company’s HNTE certificate expired as of December 31, 2010 and the Company obtained a renewed certificate in September 2011, which will expire on December 31, 2013. In accordance with the PRC Income Tax Laws, an enterprise awarded with the HNTE status may enjoy a reduced EIT rate of 15%. For the years ended December 31, 2010, 2011, 21Vianet Beijing chose to apply the tax holiday and enjoy a preferential tax rate of 12.5%. For the year ended December 31, 2012, 21Vianet Beijing applied a preferential tax rate of 15%.

In April 2011, Xi’an Sub, a subsidiary located in Shanxi Province, qualified for a preferential tax rate of 15%. The preferential tax rate is awarded for companies that have operations in certain industries and meet the criteria of the Preferential Tax Policies for Development of the West Regions. The entity’s qualification will need to be assessed on an annual basis.

In July 2012, Gehua, a subsidiary located in Guangzhou Province, qualified as a HNTE and is eligible for a 15% preferential tax rate effective from 2012 to 2014, and thereafter for an additional 3 years if it is able to satisfy the HNTE technical and administrative requirements in those 3 years.

In June 2009, Fastweb Network BJ, a subsidiary located in Beijing, qualified as a HNTE and is eligible for a 15% preferential tax rate effective from 2009 to 2011, and thereafter for an additional 3 years if it is able to meet the HNTE technical and administrative requirements in those 3 years. The Company’s HNTE certificate expired as of December 31, 2011 and the Company obtained a renewed certificate in May 2012, which will expire on December 31, 2014. For the year ended December 31, 2012, Fastweb Network BJ applied a preferential tax rate of 15%.

The Company’s other PRC subsidiaries were subject to EIT at a rate of 25% for the years ended December 31, 2010, 2011 and 2012.

The New EIT Law also provides that enterprises established under the laws of foreign countries or regions and whose “place of effective management” is located within the PRC are considered PRC tax resident enterprises and subject to PRC income tax at the rate of 25% on worldwide income. The definition of “place of effective management” refers to an establishment that exercises, in substance, overall management and control over the production and business, personnel, accounting, properties, etc. of an enterprise. As of December 31, 2012, no detailed interpretation or guidance has been issued to define “place of effective management”. Furthermore, as of December 31, 2012, the administrative practice associated with interpreting and applying the concept of “place of effective management” is unclear. If the Company is deemed as a PRC tax resident, it would be subject to PRC tax under the New CIT Law. The Company will continue to monitor changes in the interpretation or guidance of this law.

(Loss) profit from continuing operations before income taxes consists of:


	For the year ended December 31,
	2010			2011			2012
	RMB			RMB			RMB			US$
Non-PRC		(282,527	)		(4,912	)		(74,140	)		(11,900	)
PRC		49,400			64,528			167,955			26,956

		(233,127	)		59,616			93,815			15,056

Income tax benefit (expense) comprises of:


	For the year ended December 31,
	2010			2011			2012
	RMB			RMB			RMB			US$
Current		(10,581	)		(32,169	)		(45,481	)		(7,300	)
Deferred		8,993			18,492			9,322			1,496

		(1,588	)		(13,677	)		(36,159	)		(5,804	)

The reconciliation of tax computed by applying the statutory income tax rate of 25% for the years ended December 31, 2010, 2011 and 2012 applicable to the PRC operations to income tax expense is as follows:


	For the year ended December 31,
	2010		2011		2012
	RMB		RMB		RMB		US$
(Loss) profit from continuing operations before income taxes		(233,127)		59,616		93,815		15,056

Income tax benefit (expense) computed at applicable tax rates (25%)		58,282		(14,904)		(23,454)		(3,764)
Non-deductible expenses		(777)		(2,161)		(1,969)		(315)
Taxable income		(11,245)		(1,178)		—		—
Research and development expenses		533		2,982		4,313		692
Effect of tax holidays		3,621		827		—		—
Preferential rate		—		371		7,245		1,163

Current and deferred tax rate differences		553		1,331		1,804		290
International rate differences		(70,503)		(1,020)		(15,716)		(2,523)
Tax exempted income		—		—		2,635		423
Outside basis difference		613		—		—		—
Unrecognized tax benefits		(364)		(856)		(641)		(103)
Deferred tax expense		(105)		—		(3,695)		(593)
Change in valuation allowance		17,804		(32)		(5,263)		(845)
Prior year provision to return true up		—		963		(1,418)		(229)

Income tax expense		(1,588)		(13,677)		(36,159)		(5,804)

The benefit of the tax holiday per basic earnings per share is as follows:


	For the year ended December 31,
	2010		2011		2012
	RMB		RMB		RMB		US$
Basic		0.05		0.005		—		—

Diluted		0.05		0.004		—		—

Deferred Tax

The significant components of deferred taxes are as follows:


	December 31,
	2011			2012
	RMB			RMB			US$
Deferred tax assets
Current
Allowance for doubtful accounts		314			53			8
Accrued salary and welfare		2,407			3,589			576
Accrued expenses		512			1,403			225

Contingent consideration payables-current		1,727			3,498			562
Deferred government grant		—			67			11
Valuation allowance		(88	)		(25	)		(4	)

Net current deferred tax assets		4,872			8,585			1,378

Non-current
Tax losses		5,333			8,586			1,378
Property and equipment		4,824			7,102			1,140
Deferred government grant		1,281			4,540			729

Contingent consideration payables-non current		5,866			883			142
Others		23			—			—
Valuation allowance		(4,554	)		(9,880	)		(1,586	)

Net non-current deferred tax assets		12,773			11,231			1,803

Total deferred tax assets		17,645			19,816			3,181

Deferred tax liabilities
Non-current
Intangible assets		39,682			41,736			6,699
Capitalized interest		—			2,930			470

Total deferred tax liabilities		39,682			44,666			7,169

As of December 31, 2011 and 2012, the Company has net tax operating losses from its PRC subsidiaries and its Consolidated VIE, as per filed tax returns, of RMB19,987 and RMB26,616 (US$4,272), respectively, which will expire between 2013 to 2018.

As of December 31, 2012, the Company intends to permanently reinvest the undistributed earnings from other foreign subsidiaries to fund future operations. The amount of unrecognized deferred tax liabilities for temporary differences related to investments in foreign subsidiaries is not determined because such a determination is not practicable.

Unrecognized Tax Benefits

As of December 31, 2011 and 2012, the Company recorded unrecognized tax benefits of RMB26,801 and RMB12,340 (US$1,981), respectively.

The unrecognized tax benefits and its interest are primarily related to the application of a reduced income tax rate not yet approved and unqualified deemed profit tax filing method. All of other uncertain tax benefits, if ultimately recognized, will impact the effective tax rate. It is possible that the amount of uncertain tax positions will change in the next 12 months, however, an estimate of the range of the possible outcomes cannot be made at this time.

A roll-forward of unrecognized tax benefits is as follows:


	For the year ended December 31,
	2011		2012
	RMB		RMB			US$
Balance at beginning of year		5,035		25,403			4,077
Reclass to income tax payable		—		(15,931	)		(2,557	)
Additions based on tax positions related to the current year		20,368		830			133

Balance at end of year		25,403		10,302			1,653

In the years ended December 31, 2010, 2011 and 2012, the Company recorded interest expense of RMB181, RMB857 and RMB641 (US$103), respectively. Accumulated interest expense recorded by the Company was RMB1,398 and RMB2,038 (US$328) as of December 31, 2011 and 2012, respectively. As of December 31, 2012, the tax years ended December 31, 2009 through 2012 for the PRC Subsidiaries remain open for statutory examination by the PRC tax authorities.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

DISCONTINUED OPERATIONS

12 Months Ended

Dec. 31, 2012

DISCONTINUED OPERATIONS

22.

DISCONTINUED OPERATIONS

As discussed in Note 1, on March 31, 2010, the Non-IDC Business was disposed. Accordingly, pursuant to ASC 205-20 Discontinued Operations, the Non-IDC Business has been accounted for as a discontinued operation whereby the results of operations of this business have been eliminated from the results of continuing operations and reported in discontinued operations for all periods presented. The results of the discontinued operations are determined by using a combination of specific identification of revenues and certain costs as well as a reasonable allocation of the remaining costs using applicable cost drivers where specific identification is not determinable.


	For the year ended December 31, 2010
	RMB
Net Revenue		3,726
Cost of revenue		(3,846	)

Gross loss		(120	)

Operating expenses:
Sales and marketing expenses		(4,032	)
General and administrative expenses		(8,167	)
Research and development expenses		(3,046	)

Loss before income tax expenses		(15,365	)

Income tax benefit		2,413

Loss from discontinued operations		(12,952	)

Although the Non-IDC Business has been disposed on March 31, 2010, the invoicing of certain Non-IDC agreements continue to be performed by 21Vianet Beijing and 21Vianet Technology in return for a percentage of the revenue billed. Such service fee has been classified as other income in the consolidated statements of operations subsequent to March 31, 2010, with an insignificant amount for the period after the disposal date through to December 31, 2010 and nil for the years ended December 31, 2011 and 2012. These expected continuing cash flows ceased within one year as agreements were entered into and renewed annually, upon such time new agreements were entered into directly by SH Guotong and GZ Juliang. Although the indirect cash flows were a result of the cash flows of the disposed component, such cash flows were not considered significant and hence, the Non-IDC Business qualifies for classification as discontinued operations.

The net assets of the non-IDC Business are not classified as held for sale as the criteria required for the held for sale classification is not met.

The entire disclosure for the facts and circumstances leading to the completed or expected disposal, manner and timing of disposal, the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the segment in which the disposal group was reported, and the classification (whether sold or classified as held for sale) and carrying value of the assets and liabilities comprising the disposal group. Includes all disposal groups, including those classified as components of the entity (discontinued operations).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1474-107760

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
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-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e1020-107759

Reference 6: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e1012-107759

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2443-110228

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2941-110230

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 43-48
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

RELATED PARTY TRANSACTIONS

RELATED PARTY TRANSACTIONS

12 Months Ended

Dec. 31, 2012

23.

RELATED PARTY TRANSACTIONS

Related parties


Name of related parties		Relationship with the Company
aBitCool		A company owned by the same group of the Company’s Class B ordinary shareholders
BitCool Media Group Limited (“Bitcool Media”)		A company controlled by aBitCool
Beijing Wanwei Huoju Network Technology Co., Ltd. (“BJ Wanwei”) *		A company controlled by aBitCool
Qingdao 21Vianet Information Technology Co., Ltd. (“21V QD”) *		A company controlled by aBitCool
Beijing Huoju Union Network Service Co., Ltd. (“Huo Ju Lian He”) *		A company controlled by aBitCool
21V BJ *		A company controlled by aBitCool
CloudEx Beijing Science & Technology Co., Ltd. (“CE BJ”)		A company controlled by aBitCool
Beijing CloudEX Software Service Co., Ltd. (“CE Soft BJ”)		A company controlled by aBitCool
Ningbo 21Vianet Information Technology Co., Ltd. (“21V NB”) *		A company controlled by aBitCool
21V FS *		A company controlled by aBitCool
Tianjin Yunlifang Technology Co., Ltd. (“TJ Yunlifang”) *		A company controlled by aBitCool
Guangzhou Juliang Information Technology Co., Ltd (“GZ Juliang”)		A company controlled by aBitCool
21 ViaNet Engineering Technology Services Co., Ltd. (“VEE”) *		A company controlled by aBitCool
SH Guotong		A company controlled by aBitCool
21 Vianet Infrastructure Limited		A company controlled by aBitCool
21Vianet (Xi’an) Technology Co., Ltd. (“Xi’an Tech”) ***		A company controlled by 21 Vianet Infrastructure Limited


Name of related parties		Relationship with the Company
Mr. Chen Sheng (“Chen Sheng”)		Director of the Company and CEO of the Company
Mr. Zhang Jun (“Zhang Jun”)		Director and COO of the Company
Mr. Hsiao Shang-Wen (“Hsiao Shang-Wen”)		President and CFO of the Company
Mr. Xiao Feng (“Xiao Feng”)		Vice President of hosting services of the Company
Mr. Lai Ningning (“Lai Ningning”)		Vice President of network services of the Company
Mr. Wang Yanguo (“Wang Yanguo”)		Purchase Director of the Company
Mr. Lin Xiaodong (“Lin Xiaodong”)		General Manager of network services of the Company
Ms. Li Heyang (“Li Heyang”)		Financial Controller of the Company
Ms. Li Mei (“Li Mei”) ****		HR Director of the Company
Mr. Cheng Ran ****		Seller of Managed Network Entities
Mr. Liu Zaide (“Liu Zaide”)		Chief Software Officer of the Company, one of the shareholder of Lyzh Consulting Ltd.
Shi Dai Tong Lian		A company controlled by Mr. Cheng Ran
Concept Network Limited (“Concept Network”)		A company owned by Mr. Cheng Ran
Tianjin Guanbang Network Technology Co., Ltd. (“Tianjin Guanbang”)		Seller of Gehua
Beijing Huibang Fangda Technology Development Co., Ltd. (“Beijing Huibang”)		Seller of Gehua
Nanjing Chiguan Technology Development Co., Ltd (“Nanjing Chiguan”)		A company owned by Tianjin Guanbang
Lyzh Consulting Ltd. **		Seller of Fastweb
DFS DragonFund China, L.P. **		Seller of Fastweb
DFJ DragonFund Partners, LLC **		Seller of Fastweb
Draper Fisher Jurvetson Fund VIII, L.P. **		Seller of Fastweb
Draper Fisher Jurvetson Partners VIII, LLC **		Seller of Fastweb
JABE, LLC **		Seller of Fastweb

*	These companies were sold out by aBitCool in 2011 to third parties, so the balances with these companies were no longer classified as “amounts due from related parties” as of December 31, 2011 or December 31, 2012.

**	Collectively, “Sellers of Fastweb”.

***	Acquired by the Company on July 5, 2012 (Note 4).

****	Resigned in 2012, and no longer a related party thereafter.

The Company had the following related party transactions for the years ended December 31, 2010, 2011 and 2012:


	For the year ended December 31,
	2010		2011		2012
	RMB		RMB		RMB		US$
Rental of office to:
—VEE		51		—		—		—
—BJ Wanwei		60		—		—		—
Services provided to:
—SH Guotong		11,322		8,181		27,171		4,361
—GZ Juliang		1,173		268		—		—
—BJ Wanwei		1,006		—		—		—
—21V BJ		5		3		—		—
—21V FS		4		39		—		—
—Huo Ju Lian He		896		—		—		—
—CE BJ		541		854		1		—
—CE Soft BJ		2		90		215		35
—VEE		1,061		303		—		—
—TJ Yunlifang		—		93		—		—
Services provided by:
—SH Guotong		2,905		2,554		6,639		1,066
—21V NB		149		—		—		—
—Xi’an Tech		—		8,836		5,526		887
Rental of equipment from:
—Xi’an Tech		13,178		897		—		—
—21V NB		—		442		—		—
Purchases of equipment from:
—SH Guotong		—		—		1,812		291
—CE Soft BJ		—		—		515		83
—Xi’an Tech		27,633		39,896		—		—
Sales of property and equipment to:
—BJ Wanwei		4,526		—		—		—
—CE Soft BJ		1,518		—		—		—
—CE BJ		4,396		—		—		—
Sales of intangible assets to:
—CE Soft BJ		466		—		—		—
—CE BJ		428		—		—		—
—21V QD		23		—		—		—
Loans provided to:
—BitCool Media		—		—		14,771		2,371
Interest income from loan to:
—Bitcool Media		—		—		253		41
Issuance of ordinary shares for Chen Sheng’s past services:
—Sunrise (Note 20(b))		206,037		—		—		—


	For the year ended December 31,
	2010		2011		2012
	RMB		RMB		RMB		US$
Acquisition of 21V Xi’an from 21 Vianet Infrastructure Limited (Note 4)		—		—		15,977		2,564
Purchase 10% equity interests of BJ Tele from aBitCool (Note 11)		—		8,200		—		—
Purchase 99.95% equity interests of Shanghai Cloud from 21V FS (Note 4)		—		18,191		—		—
Purchase 0.05% equity interests of Shanghai Cloud from 21V BJ (Note 4)		—		9		—		—
Purchase 100% equity interests of Shenzhen Cloud from 21V FS (Note 4)		—		7,900		—		—

The Company had the following related party balances as of December 31, 2011 and 2012:


	December 31,
	2011		2012
	RMB		RMB		US$
Amounts due from related parties:
—SH Guotong		92		3,702		594
—Bitcool Media		—		15,024		2,412
—CE BJ		2		—		—
—CE Soft BJ		9		—		—
—Nanjing Chiguan		2,480		—		—
— Chen Sheng *		4,053		—		—
—Zhang Jun *		12,483		—		—
—Hsiao Shang-Wen *		1,452		—		—
—Xiao Feng *		8,269		—		—
—Lai Ningning *		8,269		—		—
—Wang Yanguo *		2,087		—		—
—Lin Xiaodong *		1,937		—		—
—Li Heyang *		401		—		—
—Li Mei *		109		—		—

		41,643		18,726		3,006

Amounts due to related parties:
Current:
—Tianjin Guanbang (Seller of Gehua)		21,209		39,592		6,355
—Concept Network (Seller of the Managed Network Entities)		43,656		47,755		7,665
—Shi Dai Tong Lian (Seller of the Managed Network Entities)		25,069		—		—
—Xi’an Tech		6,684		—		—
—Beijing Huibang (Seller of Gehua)		—		815		131
—Sellers of Fastweb		—		16,875		2,709

		96,618		105,037		16,860


	December 31,
	2011		2012
	RMB		RMB		US$
Non-current:
—Concept Network (Seller of the Managed Network Entities)		84,277		43,992		7,061
—Sellers of Fastweb		—		35,601		5,715
—Tianjin Guanbang (Seller of Gehua)		40,216		6,723		1,079

		124,493		86,316		13,855

Collectively, “the Nine Executives”

All balances with the related parties, other than the amount due from BitCool Media, as of December 31, 2011 and 2012 were unsecured, interest-free and have no fixed terms of repayment. The loan provided to BitCool Media bears an annual interest rate of 3% and will mature in April 2013. The Company has recorded the related interest income of RMB253 (US$41) using the effective interest method.

The amount due to Shi Dai Tong Lian, Concept Network and Tianjin Guanbang, and the Sellers of Fastweb as of December 31, 2012 relate to the remaining contingent purchase consideration payable for the acquisitions of the Managed Network Entities, Gehua and Fastweb (Note 4), respectively.

As disclosed in Note 12, Mr. Chen Sheng and Mr. Zhang Jun provided guarantees to banks and third party who in turn granted guarantee to the banks for the Company’s short-term bank borrowings.

The amount due from the Nine Executives as of December 31, 2011 related to the unsettled withholding individual income taxes which were subsequently repaid and fully settled by the Nine Executives in April 2012.

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39622-107864

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39678-107864

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(k))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
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-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39691-107864

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph b
-Article 3A

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph k
-Article 4

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 57
-Paragraph 1-4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

(LOSS) EARNINGS PER SHARE

RESTRICTED NET ASSETS

12 Months Ended

Dec. 31, 2012

RESTRICTED NET ASSETS

24.

RESTRICTED NET ASSETS

The Company’s ability to pay dividends is primarily dependent on the Company receiving distributions of funds from its subsidiaries. Relevant PRC statutory laws and regulations permit payments of dividends by the Company’s PRC subsidiaries only out of their retained earnings, if any, as determined in accordance with PRC accounting standards and regulations. The results of operations reflected in the consolidated financial statements prepared in accordance with U.S. GAAP differ from those reflected in the statutory financial statements of the Company’s PRC subsidiaries.

In accordance with the PRC Regulations on Enterprises with Foreign Investment and the articles of association of the Company’s PRC subsidiaries, a foreign-invested enterprise established in the PRC is required to provide certain statutory reserves, namely general reserve fund, the enterprise expansion fund and staff welfare and bonus fund which are appropriated from net profit as reported in the enterprise’s PRC statutory accounts. A foreign-invested enterprise is required to allocate at least 10% of its annual after-tax profit to the general reserve until such reserve has reached 50% of its respective registered capital based on the enterprise’s PRC statutory accounts. Appropriations to the enterprise expansion fund and staff welfare and bonus fund are at the discretion of the board of directors for all foreign-invested enterprises. The aforementioned reserves can only be used for specific purposes and are not distributable as cash dividends. 21Vianet China was established as foreign-invested enterprise and, therefore, is subject to the above mandated restrictions on distributable profits.

As a result of these PRC laws and regulations subject to the limit discussed above that require annual appropriations of 10% of after-tax income to be set aside, prior to payment of dividends as general reserve fund, the Company’s PRC Subsidiaries are restricted in their ability to transfer a portion of their net assets to the Company.

Amounts restricted include paid-in capital and statutory reserve funds of the Company’s PRC subsidiaries and the equity of the Consolidated VIE, as determined pursuant to PRC generally accepted accounting principles, totaling an aggregate of RMB1,316,583 (US$211,326) as of December 31, 2012. The Company does not have any retained earnings that are free from restriction.

(LOSS) EARNINGS PER SHARE

12 Months Ended

Dec. 31, 2012

25.

(LOSS) EARNINGS PER SHARE

Basic and diluted (loss) earnings per share for each of the years presented are calculated as follows:


	For the year ended December 31,
	2010			2011			2012
	RMB			RMB			RMB			US$
*Numerator:*
Net (loss) profit from continuing operations		(234,715	)		45,939			57,656			9,252
Less: net profit attributable to non-controlling interest		(7,722	)		(27,495	)		(1,332	)		(214	)

Net (loss) profit from continuing operations attributable to ordinary shareholders		(242,437	)		18,444			56,324			9,038
Loss from discontinued operations		(12,952	)		—			—			—

Net (loss) profit attributable to ordinary shareholders		(255,389	)		18,444			56,324			9,038

*Denominator:*
Weighted-average number of shares outstanding—basic		71,526,320			259,595,677			342,533,167			342,533,167
Weighted-average number of stock options and RSUs granted in connection with the stock option plan		—			57,211,984			14,251,042			14,251,042
Dilutive effect of preferred shares		110,966,180			—			—			—

Weighted-average number of shares outstanding—diluted		182,492,500			316,807,661			356,784,209			356,784,209

(Loss) earnings per share—Basic:
Net (loss) profit from continuing operations		(3.39	)		0.07			0.16			0.03
Loss from discontinued operations		(0.18	)		—			—			—

		(3.57	)		0.07			0.16			0.03

(Loss) earnings per share—Diluted:
Net (loss) profit from continuing Operations		(3.39	)		0.06			0.16			0.03
Loss from discontinued operations		(0.18	)		—			—			—

		(3.57	)		0.06			0.16			0.03

On March 31, 2011, the Company’s shareholders approved and executed a ten-for-one split of the Company’s ordinary shares and preferred shares. Each ordinary share and preferred share of the Company was subdivided into 10 shares at a par value of US$0.00001. All shares and per share amounts presented in the accompanying consolidated financial statements have been revised on a retroactive basis to give effect to the share split. The par value per ordinary share and preferred share has been retroactively revised as if it had been adjusted in proportion to the ten-for-one share split.

In 2011, the Company issued 8,207,178 ordinary shares to its share depositary bank which will be used to settle stock option awards upon their exercise. No consideration was received by the Company for this issuance of ordinary shares. These ordinary shares are legally issued and outstanding but are treated as escrowed shares for accounting purposes and therefore, have been excluded from the computation of earnings per share. Any ordinary shares not used in the settlement of stock option awards will be returned to the Company.

Contingently issuable shares related to the portion of contingent consideration for the acquisitions of Managed Network Entities, Gehua and Fastweb (Note 4) in the form of shares that are based on targets that have been fixed are included in the computation of basic earnings per share as the Company does not expect any circumstances under which these shares would not be issued.

SHARE CAPITAL

12 Months Ended

Dec. 31, 2012

SHARE CAPITAL

26.

SHARE CAPITAL

On October 31, 2010, the same date of the reorganization, the shareholders and Board of Directors of the Company approved certain resolutions which became effective upon the closing of the Company’s Qualified IPO as follows:

(1)

The ordinary share capital of the Company will be divided into (i) 300,000,000 Class A Ordinary Shares with a par value of US$0.00001 each (the “Class A Ordinary Shares”), (ii) 300,000,000 Class B Ordinary Shares with a par value of US$0.00001 each (the “Class B Ordinary Shares”). In March 2011, the number of authorized Class A Ordinary Shares increased from 300,000,000 to 470,000,000;

(2)

Holders of Class A Ordinary Shares and Class B Ordinary Shares are entitled to the same rights except for voting and conversion rights. In respect of matters requiring a shareholder’s vote, each Class A Ordinary Share is entitled to one vote and each Class B Ordinary Share is entitled to 10 votes. Each Class B Ordinary Share is convertible into one Class A Ordinary Share at any time by the holder. Class A Ordinary Shares are not convertible into Class B Ordinary Shares under any circumstances. Upon any transfer of Class B Ordinary Shares by a holder to any person or entity which is not an affiliate of such holder, such Class B Ordinary Shares will be automatically converted into an equal number of Class A Ordinary Shares;

(3)

All the then currently issued and outstanding 41,408,340 Series A Preferred Shares and 69,557,840 Series B Preferred Shares would be converted into Class B Ordinary Shares in accordance to the conversion rights; and

(4)

All of the then currently issued and outstanding 71,526,320 ordinary shares would be re-designated as Class B Ordinary Shares.

In July 2012, the company repurchased 2,686,965 ordinary shares from Sunrise at par value (Note 20(b)). Such shares were cancelled immediately.

The entire disclosure for shareholders' equity, comprised of portions attributable to the parent entity and noncontrolling interest, if any, including other comprehensive income (as applicable). Including, but not limited to: (1) balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings; (2) accumulated balance for each classification of other comprehensive income and total amount of comprehensive income; (3) amount and nature of changes in separate accounts, including the number of shares authorized and outstanding, number of shares issued upon exercise and conversion, and for other comprehensive income, the adjustments for reclassifications to net income; (4) rights and privileges of each class of stock authorized; (5) basis of treasury stock, if other than cost, and amounts paid and accounting treatment for treasury stock purchased significantly in excess of market; (6) dividends paid or payable per share and in the aggregate for each class of stock for each period presented; (7) dividend restrictions and accumulated preferred dividends in arrears (in aggregate and per share amount); (8) retained earnings appropriations or restrictions, such as dividend restrictions; (9) impact of change in accounting principle, initial adoption of new accounting principle and correction of an error in previously issued financial statements; (10) shares held in trust for Employee Stock Ownership Plan (ESOP); (11) deferred compensation related to issuance of capital stock; (12) note received for issuance of stock; (13) unamortized discount on shares; (14) description, terms, and number of warrants or rights outstanding; (15) shares under subscription and subscription receivables, effective date of new retained earnings after quasi-reorganization and deficit eliminated by quasi-reorganization and, for a period of at least ten years after the effective date, the point in time from which the new retained dates; and (16) retroactive effective of subsequent change in capital structure.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Paragraph 1
-Subparagraph (SX 210.4-08.(d),(e))
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Reference 11: http://www.xbrl.org/2003/role/presentationRef
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-URI http://asc.fasb.org/extlink&oid=6521494

Reference 12: http://www.xbrl.org/2003/role/presentationRef
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Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
-Section B
-Paragraph 7, 11A
-Chapter 1
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Name Accounting Principles Board Opinion (APB)
-Number 12
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Name Statement of Financial Accounting Standard (FAS)
-Number 5
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Reference 17: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph d
-Article 4

Reference 18: http://www.xbrl.org/2003/role/presentationRef
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-Name Regulation S-X (SX)
-Number 210
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-Paragraph 29, 30, 31
-Article 5

Reference 19: http://www.xbrl.org/2003/role/presentationRef
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-Name Staff Accounting Bulletin (SAB)
-Number Topic 4
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Reference 20: http://www.xbrl.org/2003/role/presentationRef
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-Name Regulation S-X (SX)
-Number 210
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Reference 21: http://www.xbrl.org/2003/role/presentationRef
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Reference 22: http://www.xbrl.org/2003/role/presentationRef
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

FAIR VALUE MEASUREMENTS

12 Months Ended

Dec. 31, 2012

FAIR VALUE MEASUREMENTS

27.

FAIR VALUE MEASUREMENTS

The Company applies ASC 820, Fair Value Measurements and Disclosures. ASC 820 defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. ASC 820 requires disclosures to be provided on fair value measurement.

ASC 820 establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value as follows:

Level 1—Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets.

Level 2—Include other inputs that are directly or indirectly observable in the marketplace.

Level 3—Unobservable inputs which are supported by little or no market activity.

ASC 820 describes three main approaches to measuring the fair value of assets and liabilities: (1) market approach; (2) income approach; and (3) cost approach. The market approach uses prices and other relevant information generated from market transactions involving identical or comparable assets or liabilities. The income approach uses valuation techniques to convert future amounts to a single present value amount. The measurement is based on the value indicated by current market expectations about those future amounts. The cost approach is based on the amount that would currently be required to replace an asset.

In accordance with ASC 820, the Company measures cash equivalents, fixed rate time deposits and the contingent consideration for the acquisitions of the Managed Network Entities, Gehua and Fastweb (Note 4) at fair value. Fixed rate time deposits are classified as held-to-maturity securities and stated at the amortized cost. Cash equivalents and fixed rate time deposits are classified within Level 1 or Level 2 because they are valued using a quoted market prices or alternative pricing sources and model utilizing market direct or indirect observable inputs, such as the risk-free interest rate. The contingent consideration for the acquisitions of the Managed Network Entities, Gehua and Fastweb is classified within Level 3. The contingent consideration is based on the achievement of certain financial targets in accordance with the sales and purchase agreements for the various periods, as well as other non-financial measures. The revenue and net profit targets were calculated based on the discounted cash flows (“DCF”) model. The DCF model involves applying appropriate discount rates to estimated cash flow forecasts that are based on forecasts of revenue and costs. Estimation of future cash flows requires us to make complex and subjective judgments regarding the Managed Network Entities’, Gehua’s and Fastweb’s projected financial and operating results, unique business risks, limited operating histories and future prospects. The Managed Network Entities’, Gehua’s and Fastweb’s revenue forecasts were based on expected annual growth rates which were derived from a combination of our historical experience and industry trends.

Assets / liabilities measured at fair value on a recurring basis are summarized below:


	Fair value measurement at December 31, 2011 using:
	Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Unobservable inputs (Level 3)		Fair value at December 31, 2011
	RMB		RMB		RMB		RMB
Cash equivalents:
— Fixed rate time deposits		5,000		—		—		5,000
Short-term investment:
— Fixed rate time deposits		894,540		—		—		894,540

		899,540		—		—		899,540


	Fair value measurement at December 31, 2011 using:
	Quoted prices in active markets for identical liabilities (Level 1)		Significant other observable inputs (Level 2)		Unobservable inputs (Level 3)		Fair value at December 31, 2011
	RMB		RMB		RMB		RMB
Amounts due to related parties:
— Contingent consideration payable in relation to the acquisition of Managed Network Entities		—		—		153,002		153,002
— Contingent consideration payable in relation to the acquisition of Gehua		—		—		61,425		61,425

		—		—		214,427		214,427


	Fair value measurement at December 31, 2012 using:
	Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Unobservable inputs (Level 3)		Fair value at December 31, 2012
	RMB		RMB		RMB		RMB		US$
Cash equivalents:
— Fixed rate time deposits		20,000		—		—		20,000		3,210
Short-term investment:
— Fixed rate time deposits		222,701		—		—		222,701		35,746

		242,701		—		—		242,701		38,956


	Fair value measurement at December 31, 2012 using:
	Quoted prices in active markets for identical liabilities (Level 1)		Significant other observable inputs (Level 2)		Unobservable inputs (Level 3)		Fair value at December 31, 2012
	RMB		RMB		RMB		RMB		US$
Amounts due to related parties:
— Contingent consideration payable in relation to the acquisition of Managed Network Entities		—		—		91,747		91,747		14,726
— Contingent consideration payable in relation to the acquisition of Gehua		—		—		46,315		46,315		7,434
— Contingent consideration payable in relation to the acquisition of Fastweb		—		—		52,476		52,476		8,424

		—		—		190,538		190,538		30,584

The following table presents a reconciliation of all liabilities measured at fair value on a recurring basis using significant unobservable inputs (level 3):


	Contingent consideration payable
	RMB
Fair value at January 1, 2011		136,741
Contingent purchase consideration payable—Managed Network Entities (Note 4)		169,168
Contingent purchase consideration payable—Gehua (Note 4)		77,469
Payment of cash consideration		(82,195	)
Payment of stock consideration (Note 17)		(20,156	)
Reclassification to equity upon resolution of contingencies		(129,785	)
Changes in the fair value		63,185
Transfers in and/or out of Level 3		—

Fair value at December 31, 2011		214,427
Contingent purchase consideration payable—Fastweb (Note 4)		116,040
Changes in the fair value		17,430
Payment of cash consideration		(59,598	)
Reclassification to equity upon resolution of contingencies		(97,761	)
Transfers in and/or out of Level 3		—

Fair value at December 31, 2012		190,538

Fair value at December 31, 2012 (US$)		30,584

As the contingencies with respect to financial performance of the Managed Network Entities and Fastweb for fiscal year 2012 were resolved, the corresponding portion of the contingent consideration in shares were remeasured on December 31, 2012 with the fair value of RMB56,564 (US$9,079) and RMB41,197 (US$6,613) reclassified to additional paid in capital, respectively.

Changes in the fair value of the contingent purchase consideration payable will be recorded in the consolidated financial statements of operations. The Company’s valuation techniques used to measure the fair value of the contingent consideration payable were derived from management’s assumptions of estimations as discussed above.

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES

12 Months Ended

Dec. 31, 2012

28.

COMMITMENTS AND CONTINGENCIES

Capital commitments

As of December 31, 2012, the Company has the following commitments to purchase certain computer and network equipment and construction in progress:


	RMB		US$
2013		141,740		22,751
2014		4,114		660
2015		4,239		680

		150,093		24,091

Investment commitments

As of December 31, 2012, the Company has a commitment to pay for the second tranche of investment of an amount of RMB50,500 for its investment in the Yizhuang Fund upon written notice by Yizhuang Fund (Note 11).

Operating lease commitments

The Company leases facilities in the PRC under non-cancelable operating leases expiring on different dates. For the years ended December 31, 2010, 2011 and 2012, total rental expenses for all operating leases amounted to RMB7,346, RMB15,363 and RMB24,082 (US$3,865), respectively.

As of December 31, 2012, the Company has future minimum lease payments under non-cancelable operating leases with initial terms in excess of one year in relation to office premises and data center space consisting of the following:


	RMB		US$
2013		83,377		13,383
2014		82,202		13,194
2015		79,235		12,718
2016		75,958		12,192
2017 and thereafter		361,019		57,948

		681,791		109,435

Payments under operating leases are expensed on a straight-line basis over the periods of their respective leases. The terms of the leases do not contain material rent escalation clauses or contingent rents.

Bandwidth and cabinet capacity purchase commitments

As of December 31, 2012, the Company had outstanding purchase commitments in relation to bandwidth and cabinet capacity consisting of the following:


	RMB		US$
2013		605,304		97,158
2014		73,083		11,731
2015		29,498		4,735
2016		4,962		796
2017 and thereafter		53,086		8,521

		765,933		122,941

Income Taxes

As of December 31, 2012, the Group has recognized an accrual of RMB12,340 (US$1,981) for unrecognized tax benefits and its interest (Note 21). The final outcome of the tax uncertainty is dependent upon various matters including tax examinations, interpretation of tax laws or expiration of statutes of limitation. However, due to the uncertainties associated with the status of examinations, including the protocols of finalizing audits by the relevant tax authorities, there is a high degree of uncertainty regarding the future cash outflows associated with these tax uncertainties. As of December 31, 2012, the Group classified the accrual for unrecognized tax benefits as a non-current liability.

The entire disclosure for commitments and contingencies.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Number 14
-Paragraph 3
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 9, 10, 11, 12
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION

SUBSEQUENT EVENTS

12 Months Ended

Dec. 31, 2012

SUBSEQUENT EVENTS

29.

SUBSEQUENT EVENTS

Property lease contract

On February 4, 2013, the Company through 21Vianet Beijing, entered into a lease agreement with Beijing Xingguang Tuocheng Investment Co., Ltd. for property and buildings for purposes of building out a new data center in the Daixing District of Beijing. The lease term is 20 years, with the first 3.5 years rent-free. After the rent-free period ends, the rent for the next 9 years will be RMB471,628, and the rent thereafter will be negotiated at a later date.

Acquisition of Beijing Tianwang Online Communication Technology Co., Ltd and Beijing Yilongxinda Technology Co., Ltd.

On February 28, 2013, the Company through 21Vianet Beijing, entered into a share purchase agreement to acquire 100% equity interest in Beijing Tianwang Online Communication Technology Co., Ltd and Beijing Yilong Xinda Technology Co., Ltd. (collectively the “Target Companies”) from Beijing Kaihua Kewei Technology Company Limited. The Target Companies principally provide virtual private network services and managed network services. The consideration for the Target Companies includes RMB17,500 in cash, as well as additional contingent consideration in both cash and shares. The contingent consideration is based on the achievement by the Target Companies of certain financial performance targets in accordance with the sales and purchase agreement for the fiscal years 2013 and 2014, as well as compliance with the terms of the sales and purchase agreement. The Company is in the process of determining the fair value of the assets acquired and liabilities assumed to allocate the purchase price, as well as the fair value of the contingent consideration in both cash and shares.

Issuance of bonds

On March 22, 2013, the Company closed on an offering of RMB1,000,000 (equivalent to US$160,500) in aggregate principal amount of bonds due 2016 at a coupon rate of 7.875% per annum (“2016 Bonds”). The 2016 Bonds were listed and quoted on the Official List of the Singapore Exchange Securities Trading Limited (the “SGX-ST”). Interest on the 2016 Bonds is payable semi-annually in arrears on March 22 and September 22 in each year, beginning September 22, 2013.

The Company intends to use the 2016 Bond proceeds for data center expansion and other general corporate purposes.

PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION

12 Months Ended

Dec. 31, 2012

30.

PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION

Condensed balance sheets


	As of December 31,
	2011			2012
	RMB			RMB			US$
ASSETS
Current assets
Cash		34,224			14,097			2,263
Restricted cash		—			190,000			30,497
Short-term investment		894,540			122,701			19,695
Prepaid expenses and other current assets		16,739			18,562			2,979
Amount due from subsidiaries		497,851			980,246			157,340

Total current assets		1,443,354			1,325,606			212,774

Non-current assets
Restricted cash		—			100,000			16,051
Investments		212,110			500,204			80,288

Total non-current assets		212,110			600,204			96,339

Total assets		1,655,464			1,925,810			309,113

LIABILITIES AND SHAREHOLDERS’ EQUITY
Current liabilities:
Accrued expenses and other payables		2,796			2,531			406
Amount due to a subsidiary		114			—			—
Amount due to related parties		—			16,875			2,709

Total current liabilities		2,910			19,406			3,115
Non-current liabilities
Amount due to related parties		—			35,601			5,715

Total non-current liabilities		—			35,601			5,715

Total liabilities		2,910			55,007			8,830

Shareholders’ equity:
Class A Ordinary shares		13			19			3
Class B Ordinary shares		10			4			1
Additional paid-in capital		3,172,372			3,212,927			515,709
Accumulated other comprehensive loss		(57,290	)		(61,232	)		(9,828	)
Accumulated deficit		(1,294,533	)		(1,238,209	)		(198,746	)
Treasury stock		(168,018	)		(42,706	)		(6,856	)

Total shareholders’ equity		1,652,554			1,870,803			300,283

Total liabilities and shareholders’ equity		1,655,464			1,925,810			309,113

Condensed statements of operations


	For the year ended December 31,
	2010			2011			2012
	RMB			RMB			RMB			US$
Operating Expenses
General and administrative expenses		(281,113	)		(49,424	)		(78,611	)		(12,618	)

Operating (loss) profit		(281,113	)		(49,424	)		(78,611	)		(12,618	)
Other (expenses) income		(49,931	)		45,344			10,570			1,694
Investment income		75,655			22,524			124,365			19,962

(Loss) profit before income taxes		(255,389	)		18,444			56,324			9,038
Income tax expense		—			—			—			—

Net (loss) income		(255,389	)		18,444			56,324			9,038

Condensed statements of cash flows


	For the year ended December 31,
	2010		2011			2012
	RMB		RMB			RMB			US$
Net cash used in operating activities		—		(712	)		(6,300	)		(1,011	)
Net cash (used in) generated from investing activities		—		(1,349,501	)		272,873			43,799
Net cash generated from (used in) financing activities		1,537		1,382,900			(286,700	)		(46,019	)

Net increase (decrease) in cash		1,537		32,687			(20,127	)		(3,231	)
Cash at beginning of the year		—		1,537			34,224			5,494

Cash at end of the year		1,537		34,224			14,097			2,263

(a)

Basis of presentation

In the Company-only financial statements, the Company’s investment in subsidiaries is stated at cost plus equity in undistributed earnings of subsidiaries since inception.

The Company records its investment in its subsidiary under the equity method of accounting as prescribed in ASC 323-10, Investment-Equity Method and Joint Ventures, and such investment is presented on the balance sheet as “Investment in subsidiaries” and the share of the subsidiaries’ profit or loss is presented as “Equity in profit of subsidiaries” on the statements of operations.

The subsidiaries did not pay any dividends to the Company for the periods presented.

Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted and as such, these Company-only financial statements should be read in conjunction with the Group’s consolidated financial statements.

(b) Related party transactions

The Company had the following related party transactions for the years ended December 31, 2010, 2011 and 2012:


	For the year ended December 31,
	2010		2011		2012
	RMB		RMB		RMB		US$
Expenses paid on behalf by:
—aBitCool		2,485		—		—		—

Waiver of liability by:
—aBitCool		116,069		—		—		—

Waiver of receivables to:
—21Vianet Technology		28,990		—		—		—
—21Vianet Beijing		20,941		—		—		—

The Company had the following related party balances as of December 31, 2011 and 2012:


	December 31,
	2011		2012
	RMB		RMB		US$
Amount due from subsidiaries
—21Vianet HK		484,442		968,866		155,514
—21Vianet Beijing		13,409		11,380		1,826

		497,851		980,246		157,340

Amount due to subsidiaries
—21Vianet Technology		66		—		—
—ZBXT		48		—		—

		114		—		—

Amount due to related parties
Current
—Sellers of Fastweb		—		16,875		2,709
Non-current
—Sellers of Fastweb		—		35,601		5,715

		—		52,476		8,424

(c) Commitments

The Company does not have any significant commitments or long-term obligations as of any of the periods presented.

The entire disclosure for condensed financial information, including the financial position, cash flows, and the results of operations of the registrant (parent company) as of the same dates or for the same periods for which audited consolidated financial statements are being presented. Alternatively, the details of this disclosure can be reported by the specific parent company taxonomy elements, indicating the appropriate date and period contexts in an instance document.

Principles of Consolidation

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

12 Months Ended

Dec. 31, 2012

Basis of Presentation

(a)

Basis of Presentation

The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”).

(b)

Principles of Consolidation

Use of Estimates

(c)

Use of estimates

Foreign Currency

(d)

Foreign Currency

Convenience Translation

(e)

Convenience Translation

Cash, Cash Equivalents and Short-term investments

(f)

Cash, Cash Equivalents and Short-term investments

Accounts Receivable and Allowance for Doubtful Accounts

(g)

Restricted cash

(h)

Accounts Receivable and Allowance for Doubtful Accounts

Property and Equipment

(i)

Property and equipment

Property and equipment are stated at cost and are depreciated using the straight-line method over the estimated useful lives of the assets, as follows:


Category		Estimated useful life
Buildings		25 years
Leasehold improvements		Over the shorter of lease term or the estimated useful lives of the assets
Optical fibers		20 years
Computer and network equipment		5 years
Office equipment		5 years
Motor vehicles		5 years

Intangible Assets

(j)

Intangible assets

Intangible assets have weighted average useful lives from the date of purchase as follows:


Purchased software		4.9 years
Radio spectrum license		15 years
Network use right		20 years
Contract backlog *		1.1 years
Customer relationships *		7.3 years
Supplier relationships *		9.5 years
Licenses *		15 years
Trade Name *		15 years
Platform software *		5 years

Acquired in the acquisition of SH Guotong, the Managed Network Entities, Gehua and Fastweb (Note 4).

Long-Term Investments

(k)

Long-term investments

The Company’s long-term investments consist of cost method investments and equity method investments.

Goodwill

(l)

Goodwill

Impairment of Long-Lived Assets and Intangibles

(m)

Impairment of long-lived assets and intangibles

Fair Value of Financial Instruments

(n)

Fair value of financial instruments

Revenue recognition

(o)

Revenue recognition

The business tax expenses for the years ended December 31, 2010, 2011 and 2012 amounted to RMB20,519, RMB42,241 and RMB56,106 (US$9,006), respectively.

Cost of revenues

(p)

Cost of revenues

Advertising Expenditures

(q)

Advertising expenditures

Research and Development Expenses

(r)

Research and development expenses

Government Grants

(s)

Government grants

Leases

(t)

Leases

Income Taxes

(u)

Income taxes

The Company has elected to classify interest and penalties related to unrecognized tax benefits, if and when required, as part of “income tax” in the consolidated statements of operations.

Discontinued Operations

(v)

Discontinued operations

Share-Based Compensation

(w)

Share-based compensation

Earnings Per Share

(x)

Earnings per share

Share repurchase program

(y)

Share repurchase program

Comprehensive income (loss)

(z)

Comprehensive income (loss)

Segment Reporting

(aa)

Segment reporting

Employee Benefits

(bb)

Employee benefits

Recent Accounting Pronouncements

(cc)

Recent accounting pronouncements

ORGANIZATION (Tables)

12 Months Ended

Dec. 31, 2012

Summary Of Subsidiaries And Consolidated Variable Interest Entities

As of December 31, 2012, subsidiaries of the Company and its consolidated variable interest entities where the Company is the primary beneficiary includes the following entities:


Entity	Date of incorporation/ Acquisition	Place of incorporation	Percentage of direct ownership by the Company			Principal activities
			Direct
Subsidiaries:
21ViaNet Group Limited (“21Vianet HK”)	May 25, 2007	Hong Kong		100	%	Investment holding
21ViaNet Data Center Co., Ltd. (“21Vianet China”) ⁽¹⁾	June 12, 2000	PRC		100	%	Provision of technical and consultation services and rental of long-lived assets
Fastweb International Holdings (“Fastweb Holdings”) ⁽⁵⁾	September 9, 2012	Cayman Islands		100	%	Investment holding
Hongkong Fastweb Holdings Co., Limited (“Fastweb HK”) ⁽⁵⁾	September 9, 2012	Hong Kong		100	%	Investment holding
Beijing Fastweb Technology Co., Ltd. (“Fastweb Technology”) ^(1) / (5)	September 9, 2012	PRC		100	%	Dormant Company
21Vianet (Foshan) Technology Co., Ltd. (“FS Technology”) ⁽¹⁾	December 20, 2011	PRC		100	%	Trading of network equipment
21Vianet Anhui Suzhou Technology Co., Ltd. (“SZ Technology”) ⁽¹⁾	November 16, 2011	PRC		100	%	Trading of network equipment
21ViaNet@Xian Holding Limited (“21V Xi’an Holding”) ⁽⁴⁾	July 5, 2012	British Virgin Islands		100	%	Investment holding
21Vianet (Xi’an) Technology Co., Ltd. (“Xi’an Tech”) ^(1) / (4)	July 5, 2012	PRC		100	%	Provision of internet data center

Variable Interest Entity (the “VIE”)
Beijing aBitCool Network Technology Co., Ltd. (“21Vianet Technology”) ^(1) / (2)	October 22, 2002	PRC		—		Provision of internet data center and managed network services

Held directly by 21Vianet Technology:
Beijing 21Vianet Broad Band Data Center Co., Ltd. (“21Vianet Beijing”) ^(1) / (2)	March 15, 2006	PRC		—		Provision of internet data center and managed network services

Held directly by 21Vianet Beijing:
Shanghai Wantong 21Vianet Information Technology Co., Ltd. (“SH Wantong”) ^(1) / (2)	February 20, 2008	PRC		—		Provision of internet data center services
21Vianet (Xi’an) Information Outsourcing Industry Park Services Co., Ltd. (“Xi’an Sub”) ^(1) / (2)	June 23, 2008	PRC		—		Provision of internet data center services
Beijing Chengyishidai Network Technology Co., Ltd. (“CYSD”) ^{(1) / (2) / (3)}	September 30, 2010	PRC		—		Provision of managed network services
Zhiboxintong (Beijing) Network Technology Co., Ltd. (“ZBXT”) ^(1) / (2) ^/ (3)	September 30, 2010	PRC		—		Provision of managed network services
Beijing Bozhiruihai Network Technology Co., Ltd.^(1) / (2) ^/ (3)	September 30, 2010	PRC		—		Provision of managed network services
Beijing Bikonghengtong Network Technology Co., Ltd. ^{(1) / (2) / (3)}	September 30, 2010	PRC		—		Provision of managed network services
Xingyunhengtong Beijing Network Technology Co., Ltd. ^{(1) / (2) / (3)}	September 30, 2010	PRC		—		Provision of managed network services
Fuzhou Yongjiahong Communication Technology Co., Ltd. ^{(1) / (2) / (3)}	September 30, 2010	PRC		—		Provision of managed network services
Jiujiang Zhongyatonglian Network Technology Co., Ltd. ^{(1) / (2) / (3)}	November 16, 2010	PRC		—		Provision of managed network services
Guangzhou Gehua Network Technology and Development Co., Ltd.^(1) (2)(“Gehua”)	October 8, 2011	PRC		—		Provision of managed network services
Shanghai Cloud 21Vianet Network Co., Ltd.^(1) / (2)(“SH Cloud”)	October 1, 2011	PRC		—		Dormant Company
Shenzhen Cloud Information Technology Co., Ltd. ^(1) / (2)(“SZ Cloud”)	October 27, 2011	PRC		—		Dormant Company
Langfang Xunchi Computer Data Processing Co., Ltd. ^(1) / (2)	December 19, 2011	PRC		—		Dormant Company
Beijing Fastweb Network Technology Co., Ltd. (“Fastweb Network BJ”) ^{(1) / (2) / (5)}	September 9, 2012	PRC		—		Provision of internet data center and internet content delivery network services
Shanghai Fawei Technology Co., Ltd. (“SH Fawei”) ^{(1) / (2) / (5)}	July 18, 2008	PRC		—		Internet data center, content delivery network and related services
Suzhou Fastweb Technology Co., Ltd. (“SZ Fastweb”) ^{(1) / (2) / (5)}	February 1, 2010	PRC		—		Dormant Company
Hangzhou Zhentuo Information Technology Co., Ltd. (“HZ Zhentuo”) ^{(1) / (2) / (6)}	August 16, 2012	PRC		—		Dormant Company
Shanghai Xiangyun 21Vianet Network Technology Co., Ltd. (“SH Xiangyun”) ^{(1) / (2) / (7)}	October 22, 2012	PRC		—		Dormant Company

(1)

Collectively “PRC Subsidiaries”

(2)

Collectively “Consolidated VIE”

(3)

Collectively “Managed Network Entities”

(4)

(5)

On September 9, 2012, the Company and its subsidiary, 21Vianet Beijing, acquired 100% equity interests in these entities (collectively referred to as “Fastweb”) (Note 4).

(6)

On August 16, 2012, HZ Zhentuo was incorporated in Hangzhou in the PRC by 21Vianet Beijing as a wholly-owned subsidiary.

(7)

On October 22, 2012, SH Xiangyun was incorporated in Shanghai in the PRC by 21Vianet Beijing as a wholly-owned subsidiary.

Consolidated VIE Included In Accompanying Consolidated Financial Statements


	As of December 31,
	2011		2012
	RMB		RMB		US$
Total assets		1,165,210		1,630,208		261,666
Total liabilities		704,879		930,038		149,281


	For the Year Ended December 31,
	2010		2011		2012
	RMB		RMB		RMB		US$
Net revenues		525,203		1,020,929		1,524,158		244,644
Net profit		30,668		51,566		122,552		19,671


	For the Year Ended December 31,
	2010			2011			2012
	RMB			RMB			RMB			US$
Net cash provided by operating activities		80,663			150,739			169,304			27,175
Net cash used in investing activities		(616	)		(224,704	)		(205,069	)		(32,916	)
Net cash provided by financing activities		41,835			86,109			110,076			17,668

Tabular disclosure of the significant judgments and assumptions made in determining whether a variable interest (as defined) held by the entity requires the variable interest entity (VIE) (as defined) to be consolidated and (or) disclose information about its involvement with the VIE, individually or in aggregate (as applicable); the nature of restrictions, if any, on the consolidated VIE's assets and on the settlement of its liabilities reported by an entity in its statement of financial position, including the carrying amounts of such assets and liabilities; the nature of, and changes in, the risks associated with involvement in the VIE; how involvement with the VIE affects the entity's financial position, financial performance, and cash flows; the lack of recourse if creditors (or beneficial interest holders) of the consolidated VIE have no recourse to the general credit of the primary beneficiary (if applicable); the terms of arrangements, giving consideration to both explicit arrangements and implicit variable interests, if any, that could require the entity to provide financial support to the VIE, including events or circumstances that could expose the entity to a loss; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; the significant factors considered and judgments made in determining that the power to direct the activities of a VIE that most significantly impact the VIE's economic performance are shared (as defined); the carrying amounts and classification of assets and liabilities of the VIE included in the statement of financial position; the entity's maximum exposure to loss, if any, as a result of its involvement with the VIE, including how the maximum exposure is determined and significant sources of the entity's exposure to the VIE; a comparison of the carrying amounts of the assets and liabilities and the entity's maximum exposure to loss; information about any liquidity arrangements, guarantees, and (or) other commitments by third parties that may affect the fair value or risk of the entity's variable interest in the VIE; whether or not the entity has provided financial support or other support (explicitly or implicitly) to the VIE that it was not previously contractually required to provide or whether the entity intends to provide that support, including the type and amount of the support and the primary reasons for providing the support; and supplemental information the entity determines necessary to provide.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=7880789&loc=d3e5747-111685

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=7880789&loc=SL6228884-111685

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=7880789&loc=d3e5728-111685

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Variable Interest Entity
-URI http://asc.fasb.org/extlink&oid=6528138

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=7880789&loc=d3e5710-111685

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 5A
-URI http://asc.fasb.org/extlink&oid=7880789&loc=SL6759159-111685

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 140
-Paragraph 35
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 46R
-Paragraph 2, 14, 15, 16, 23, 24, 25, 26
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 167
-Paragraph 24
-Appendix D

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS140-4/FIN46(R)-8
-Paragraph C4
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 167
-Paragraph 22B
-Appendix D

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 167
-Paragraph 23A
-Appendix D

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 167
-Paragraph 22E
-Appendix D

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 46R
-Paragraph 4
-Subparagraph g
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Estimated Useful Lives of Property and Equipment

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2012

Property and equipment are stated at cost and are depreciated using the straight-line method over the estimated useful lives of the assets, as follows:


Category		Estimated useful life
Buildings		25 years
Leasehold improvements		Over the shorter of lease term or the estimated useful lives of the assets
Optical fibers		20 years
Computer and network equipment		5 years
Office equipment		5 years
Motor vehicles		5 years

Weighted Average Useful Lives of Intangible Assets

Intangible assets have weighted average useful lives from the date of purchase as follows:


Purchased software		4.9 years
Radio spectrum license		15 years
Network use right		20 years
Contract backlog *		1.1 years
Customer relationships *		7.3 years
Supplier relationships *		9.5 years
Licenses *		15 years
Trade Name *		15 years
Platform software *		5 years

Acquired in the acquisition of SH Guotong, the Managed Network Entities, Gehua and Fastweb (Note 4).

ACQUISITIONS (Tables)

12 Months Ended

Dec. 31, 2012

21V Xi'an

Estimated Fair Values of Assets Acquired and Liabilities Assumed as of Date of Acquisition

The following table summarizes the estimated fair values of the assets acquired and liabilities assumed as of the date of acquisition:


Net assets acquired	RMB

Current assets		7,284
Property and equipment, net		24,820
Other payables		(2,761	)
Amount due to related parties		(390	)
Deferred tax liability		(2,437	)

Total net assets acquired		26,516
Purchase consideration		15,977

Bargain purchase gain recognized		(10,539	)

Estimated Fair Values of Assets Acquired and Liabilities Assumed as of Date of Acquisition

The following table summarizes the estimated fair values of the assets acquired and liabilities assumed as of the date of acquisition:


	RMB
Current assets		25,042
Property and equipment, net		11,333
Contract backlog (Note 9)		1,850
Customer relationships (Note 9)		13,500
Supplier relationships (Note 9)		1,955
Platform software (Note 9)		8,900
Deferred tax assets		1,450

Total assets acquired		64,030

Accounts payable		7,237
Current liabilities		13,454
Deferred tax liabilities, non-current		6,551

Total liabilities assumed		27,242

Net assets acquired		36,788
Purchase consideration		116,040

Goodwill		79,252

Purchase Price Consideration


	RMB
Cash consideration (i)		33,395
Contingent ordinary shares issuance * (ii)		82,645

Total fair value of purchase price consideration		116,040

The Company determined the fair value of the contingent share consideration with the assistance of an independent third party valuation firm.

Details of the purchase consideration are as follows:

(i)

RMB7,502 and RMB 9,373 of the above cash consideration was paid in September and October 2012, respectively. The remaining balance of RMB16,875 of cash consideration has been paid in 2013.

(ii)

Unaudited Pro Forma Consolidated Financial Information

The pro forma adjustments are based on available information and certain assumptions the management believes are reasonable.


	For the year ended December 31
	2011		2012		2012
	RMB		RMB		US$
Net revenue		1,076,518		1,574,918		252,792
Net profit		42,498		49,957		8,019
Earnings per share basic (RMB)		0.06		0.14		0.02

Managed Network Entities

Purchase Price Consideration


	RMB
Cash consideration (i)		50,000
Contingent consideration in cash * (iii)		38,536
Contingent ordinary shares issuance * (iii) and (iv)		75,494
Option to acquire the Company’s ordinary shares * (ii)		15,174
Less: Call option to purchase the remaining 49% equity interest in the Managed Network Entities (ii)		(6,765	)

Total fair value of purchase price consideration		172,439

Details on the purchase consideration are discussed as follows:

(i)

The cash consideration of RMB50,000 was paid in September 2010.

(ii)

(iii)

(iv)

Business Acquisition

On December 15, 2011, the Company exercised the option to acquire the remaining 49% equity interest of the Managed Network Entities, as follows:


	RMB
Contingent cash consideration		69,917
Contingent ordinary share issuance		99,251

Total fair value of purchase price consideration		169,168

Guangzhou Gehua Network Technology and Development Co., ("Gehua")

Purchase Price Consideration

As a part of the Company’s business expansion strategy into the provision of managed network services that are complementary to its core IDC business, the Company through 21Vianet Beijing, acquired 100% equity interest in Gehua from a related party for a total purchase consideration of RMB 77,469 on October 19, 2011, as follows:


	RMB
Cash consideration (i)		14,820
Contingent consideration in cash * (ii)		15,949
Contingent ordinary shares issuance * (iii)		46,700

Total fair value of purchase price consideration		77,469

The Company determined the fair value of the contingent consideration in cash and ordinary shares with the assistance of an independent third party valuation firm.

Details on the purchase consideration are discussed as follows:

(i)

The cash consideration of RMB14,820 was paid in October 2011.

(ii)

(iii)

Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate.

Accounts Receivable and Allowance for Doubtful Accounts

ACCOUNTS RECEIVABLE, NET (Tables)

12 Months Ended

Dec. 31, 2012

Accounts receivable and the allowance for doubtful accounts consist of the following:


	December 31,
	2011			2012
	RMB			RMB			US$
Accounts receivable		149,745			293,710			47,144
Allowance for doubtful debts		(2,121	)		(341	)		(55	)

		147,624			293,369			47,089

Analysis of Allowance for Doubtful Accounts

An analysis of the allowance for doubtful accounts is as follows:


	For the year ended December 31,
	2011			2012
	RMB			RMB			US$
Balance at beginning of the year		2,453			2,121			341
Provision		183			538			86
Write-off of accounts receivable		(515	)		(2,318	)		(372	)

Balance at the end of the year		2,121			341			55

SHORT-TERM INVESTMENTS (Tables)

12 Months Ended

Dec. 31, 2012

Short Term Investments

Short-term investments consisted of the following as of December 31, 2011 and 2012:

As of December 31, 2011

Carrying Value

Unrealized
gains/(losses)

Estimated Fair
Value

RMB

Held-to-maturity securities

—Fixed rate time deposits

894,540

—

894,540

As of December 31, 2012

Carrying Value

Unrealized
gains/(losses)

Estimated Fair
Value

RMB

US$

Held-to-maturity securities

—Fixed rate time deposits

222,701

—

222,701

35,746

PREPAID EXPENSES AND OTHER CURRENT ASSETS (Tables)

12 Months Ended

Dec. 31, 2012

Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consist of the following:


	December 31,
	2011		2012
	RMB		RMB		US$
Prepaid expenses for bandwidth, rented computer rooms and cabinets		15,478		19,913		3,196
Staff field advances		993		2,530		406
Interest receivable		10,295		6,998		1,123
Loans to shareholder of iJoy (Note 4)		—		12,885		2,068
Receivables for the disposal of certain construction-in-progress		—		20,290		3,257
Tax recoverable		2,140		8,422		1,352
Office deposits		4,612		8,288		1,330
Other receivables		14,057		16,430		2,638

		47,575		95,756		15,370

PROPERTY AND EQUIPMENT, NET (Tables)

12 Months Ended

Dec. 31, 2012

Property and Equipment Including Those Held under Capital Leases

Property and equipment, including those held under capital leases, consist of the following:


	December 31,
	2011			2012
	RMB			RMB			US$
At cost:

Buildings		11,089			32,035			5,142
Leasehold improvements		55,855			170,519			27,370
Computer and network equipment		431,311			665,040			106,747
Optical fibers		63,094			64,700			10,385
Office equipment		7,257			7,113			1,142
Motor vehicles		343			1,485			238

		568,949			940,892			151,024
Less: Accumulated depreciation		(201,526	)		(296,521	)		(47,595	)

		367,423			644,371			103,429
Construction-in-progress		86,460			178,336			28,625

		453,883			822,707			132,054

Depreciation Expense

Depreciation expense was RMB19,673, RMB58,873 and RMB92,786 (US$14,893) for the years ended December 31, 2010, 2011 and 2012, respectively, and were included in the following captions:


	For the year ended December 31,
	2010		2011		2012
	RMB		RMB		RMB		US$
Cost of revenues		11,863		41,271		69,883		11,217
Sales and marketing expense		777		966		814		130
General and administrative expense		2,071		2,034		2,691		432
Research and development expense		4,962		14,602		19,398		3,114

		19,673		58,873		92,786		14,893

Carrying Amounts of Property and Equipment Held under Capital Leases

The carrying amounts of the Company’s property and equipment held under capital leases at respective balance sheet dates were as follows:


	December 31,
	2011			2012
	RMB			RMB			US$
Computer and network equipment		80,578			87,272			14,008
Optical fibers		63,094			64,700			10,385

		143,672			151,972			24,393
Less: accumulated depreciation		(15,790	)		(33,115	)		(5,315	)

		127,882			118,857			19,078

Carrying Amounts of Computer and Network Equipment Pledged to Secure Banking Borrowings

The carrying amounts of computer and network equipment pledged by the Company to secure banking borrowings (Note 12) granted to the Company at the respective balance sheet dates were as follows:


	December 31,
	2011		2012
	RMB		RMB		US$
Buildings		—		19,381		3,111
Computer and network equipment		20,000		46,320		7,435

INTANGIBLE ASSETS, NET (Tables)

12 Months Ended

Dec. 31, 2012

Summary of Intangible Assets

The following table presents the Company’s intangible assets as of the respective balance sheet dates:


	Purchased software			Radio spectrum license			Network use right			Contract backlog*			Customer relationships*			Licenses from acquisition*			Supplier relationships*			Trade names*			Platform software*			Total
	RMB			RMB						RMB			RMB			RMB			RMB			RMB			RMB			RMB
Intangible assets, net January 1, 2011		3,916			—			—			1,905			41,403			1,298			93,519			15,045			—			157,086
Additions		1,020			—			—			910			8,410			100			22,020			—			—			32,460
Disposals		(3	)		—			—			—			—			—			—			—			—			(3	)
Amortization expense		(1,716	)		—			—			(1,913	)		(14,730	)		(90	)		(10,635	)		(1,020	)		—			(30,104	)

Intangible assets, net December 31, 2011		3,217			—			—			902			35,083			1,308			104,904			14,025			—			159,439
Additions		12,217			121,425			20,000			1,850			13,500			—			1,955			—			8,900			179,847
Amortization expense		(1,907	)		(6,119	)		(167	)		(1,223	)		(10,948	)		(95	)		(13,305	)		(1,020	)		(593	)		(35,377	)

Intangible assets, net December 31, 2012		13,527			115,306			19,833			1,529			37,635			1,213			93,554			13,005			8,307			303,909

Intangible assets, net December 31, 2012 (US$)		2,173			18,508			3,183			245			6,041			195			15,016			2,087			1,333			48,781

*	Acquired in the acquisition of SH Guotong, Managed Network Entities, Gehua and Fastweb (Note 4).

Annual Estimated Amortization Expenses of Intangible Assets

The annual estimated amortization expenses for the intangible assets for each of the next five years are as follows:


	2013		2014		2015		2016		2017
	RMB		RMB		RMB		RMB		RMB
Purchased software		4,341		3,626		3,503		3,209		2,561
Radio Spectrum License		8,105		8,105		8,105		8,105		8,105
Network use right		1,000		1,000		1,000		1,000		1,000
Contract backlog		1,385		—		—		—		—
Customer relationship		9,568		7,825		6,501		5,432		2,891
Licenses from acquisition		95		95		95		95		95
Supplier relationship		13,093		11,790		11,790		11,790		11,790
Trade names		1,020		1,020		1,020		1,020		1,020
Platform software		1,779		1,779		1,779		1,779		1,191
		40,386		35,240		33,793		32,430		28,653

GOODWILL (Tables)

12 Months Ended

Dec. 31, 2012

Goodwill

Goodwill is comprised of the following:


	December 31,
	2011		2012
	RMB		RMB		US$
Acquisition of SH Guotong		12,507		12,507		2,007
Acquisition of the Managed Network Entities		157,664		157,664		25,307
Acquisition of Gehua		47,265		47,265		7,587
Acquisition of Fastweb		—		79,252		12,721

		217,436		296,688		47,622

Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

Investment in Equity Investee

LONG-TERM INVESTMENTS (Tables)

12 Months Ended

Dec. 31, 2012

Investment in an equity investee

As of December 31, 2011

Increase (decrease) during
the year ended
December 31, 2012

As of December 31, 2012

Cost
investment

Share
equity
income

Investment
in equity
investee

Cost
investment

Share equity
loss

Cost
investment

Share equity
loss

Investment
in equity
investee

RMB

US$

Yizhuang Fund

—

50,500

(1,101

)

50,500

(1,101

)

49,399

7,929

BANK BORROWINGS (Tables)

12 Months Ended

Dec. 31, 2012

Summary of Bank Borrowings

Bank borrowings are as follows as of the respective balance sheet dates:


	As of December 31,		As of December 31,
	2011		2012		2012
	(RMB)		(RMB)		(US$)
Short-term borrowings		100,000		176,961		28,404
Long-term borrowings, current portion		—		167,879		26,946

		100,000		344,840		55,350
Long-term borrowings, non-current portion		—		63,000		10,112

Total bank borrowings		100,000		407,840		65,462

Current and Non-Current Portions of Long Term Bank Borrowings

The current and non-current portions of long-term bank borrowings as of December 31, 2012 will be due in installments between the periods of May 25, 2013 to May 25, 2015, as follows:


	RMB		US$
2013		167,879		26,946
2014		13,000		2,086
2015		50,000		8,026

		230,879		37,058

Secured or Guaranteed Short Term Bank Borrowings

Bank borrowings as of December 31, 2011 and 2012 were secured/guaranteed by the following:

December 31, 2011


Short-term borrowings		Secured/guaranteed by
(RMB)
	30,000	Jointly guaranteed by (i) a third party guarantor and (ii) the Company’s computer and network equipment with net book value of RMB20,000 (Note 8). Mr. Chen Sheng, Director and CEO of the Company and Mr. Zhang Jun, Director and COO of the Company, also provided a guarantee to the third party guarantor for this bank borrowing with an upper limit of RMB12,000.
	30,000	Guaranteed by a third party guarantor.
	30,000	Jointly guaranteed by Mr. Chen Sheng, Director and CEO of the Company and Mr. Zhang Jun, Director and COO of the Company.
	10,000	Unsecured loan.

	100,000

December 31, 2012


Short-term borrowings		Secured/guaranteed by
(RMB)
	20,000	Jointly guaranteed by (i) a third party guarantor and (ii) the Company’s computer and network equipment with a net book value of RMB25,720 (Note 8). Mr. Chen Sheng, Director and CEO of the Company and Mr. Zhang Jun, Director and COO of the Company, also provided a guarantee to the third party guarantor with an upper limit of RMB20,000.
	30,000	Jointly guaranteed by (i) a third party guarantor and (ii) the Company’s computer and network equipment with net book value of RMB20,600 (Note 8). Mr. Chen Sheng, Director and CEO of the Company and Mr. Zhang Jun, Director and COO of the Company, also provided a guarantee to the third party guarantor with an upper limit of RMB30,000.
	30,000	Jointly guaranteed by (i) a third party guarantor and (ii) the Company’s property with a net book value of RMB19,381 (Note 8). Mr. Chen Sheng, Director and CEO of the Company and Mr. Zhang Jun, Director and COO of the Company, also provided a guarantee to the third party guarantor with an upper limit of RMB30,000.
	90,000	Jointly guaranteed by Mr. Chen Sheng Director and CEO of the Company and Mr. Zhang Jun, Director and COO of the Company.
	6,961	Jointly guaranteed by (i) Mr. Chen Sheng Director and CEO of the Company and Mr. Zhang Jun, COO of the Company, and (ii) restricted cash of RMB766.

	176,961


Long-term borrowings (including current portion)		Secured/guaranteed by
(RMB)
	63,000	Guaranteed by restricted cash of RMB100,000.
	167,879	Guaranteed by restricted cash of RMB190,000.

	230,879

ACCRUED EXPENSES AND OTHER PAYABLES (Tables)

12 Months Ended

Dec. 31, 2012

Components of Accrued Expenses and Other Payables

The components of accrued expenses and other payables are as follows:


	December 31,
	2011		2012
	RMB		RMB		US$
Payroll and welfare payable		20,486		23,395		3,756
Business and other taxes payable		58,640		52,368		8,406
Payables for office supplies and utilities		2,248		2,424		390
Payables for the purchase of property and equipment		33,273		50,648		8,131
Payables for the purchase of software		426		307		50
Payable for purchase of network use right (Note 9)		—		19,881		3,191
Accrued service fees		5,316		12,248		1,966
Others		3,937		6,227		1,000

		124,326		167,498		26,890

CAPITAL LEASE OBLIGATIONS (Tables)

12 Months Ended

Dec. 31, 2012

Future Minimum Lease Payments Under Non Cancellable Capital Lease Arrangements

Future minimum lease payments under non-cancellable capital lease arrangements are as follows:


	RMB			US$
2013		42,151			6,766
2014		30,862			4,954
2015		25,497			4,093
2016		712			114
2017 and thereafter		890			143

Total minimum lease payments		100,112			16,070
Less: amount representing interest		(11,041	)		(1,773	)

Present value of remaining minimum lease payments		89,071			14,297

DEFERRED GOVERNMENT GRANTS (Tables)

12 Months Ended

Dec. 31, 2012

Movements of Deferred Government Grants

Movements of deferred government grants are as follows:


	For the year ended December 31,
	2011			2012
	RMB			RMB			US$
Balance at beginning of the year		5,400			5,819			934
Additions		1,000			15,850			2,544
Recognized in income as a reduction of depreciation expense		(581	)		(2,876	)		(462	)

Balance at end of the year		5,819			18,793			3,016

SHARE BASED COMPENSATION (Tables)

12 Months Ended

Dec. 31, 2012

Summary of Employee Share Option Activity Under Twenty Ten Plan

The following table summarized the Company’s employee share option activity under the 2010 Plan:


	Number of options			Weighted average exercise price		Weighted average remaining contractual term		Aggregate intrinsic value
				(US$)		(Years)		(US$)
Outstanding, January 1, 2012		18,180,898			0.24		7.2		23,425
Granted		3,829,830			0.54
Exercised		(3,128,472	)		0.17
Forfeited		(983,860	)		0.89

Outstanding, December 31, 2012		17,898,396			0.28		6.9		23,571

Vested and expected to vest at December 31, 2012		17,898,396			0.28		6.9		23,571

Exercisable as of December 31, 2012		11,715,639			0.19		6.3		16,485

Assumptions Used to Calculate Grant Date Estimated Fair Value of Share Options Using Black Scholes Option Valuation Model or Binomial Lattice Model

Granted in 2010

Granted in 2011

Granted in 2012

Before September 30,
2011

After September 30,
2011

Risk-free interest rates

1.41%-2.35%

1.03%-3.36%

2.06%-3.68%

Expected life (years)

0.71-4.04 years

0.08-7.75 years

Not applicable

Sub optimal early exercise factor

Not applicable

2.2

Expected volatility

40.14%-67.24%

24.25%-76%

69.17%

57.01%-68.03%

Expected dividend yield

Fair value of share option

US$0.83

US$1.20-US$2.06

US$1.02-US$1.03

US$1.34-US$1.68

Restricted Stock Units Activity

The following table summarizes the Company’s RSU activity (including RSUs with performance conditions) under the 2010 Plan:


	Number of RSUs			Weighted-average grant date fair value		Weighted-average remaining contractual life		Aggregate intrinsic value
				(US$)		(Years)		(US$)
Unvested, January 1, 2012		—			—
Granted		812,187			10.27
Vested		(107,582	)		11.01
Forfeited		(18,762	)		11.31

Unvested, December 31, 2012		685,843			10.12		9.4		1,098

Total Compensation Expense Recognized Relating to Options Granted to Employees

Total compensation expense relating to options and RSUs granted to employees recognized for the years ended December 31, 2010, 2011 and 2012 is as follows:


	For the year ended December 31,
	2010		2011		2012
	RMB		RMB		RMB		US$
Cost of revenues		4,645		2,157		4,517		725
Sales and marketing expenses		11,884		5,763		10,508		1,687
General and administration expenses		48,899		31,420		47,749		7,664
Research and development expenses		6,416		2,619		4,858		780

		71,844		41,959		67,632		10,856

Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.

Profit or Loss From Continuing Operations Before Income Taxes

TAXATION (Tables)

12 Months Ended

Dec. 31, 2012

(Loss) profit from continuing operations before income taxes consists of:


	For the year ended December 31,
	2010			2011			2012
	RMB			RMB			RMB			US$
Non-PRC		(282,527	)		(4,912	)		(74,140	)		(11,900	)
PRC		49,400			64,528			167,955			26,956

		(233,127	)		59,616			93,815			15,056

Income Tax Benefit Expense

Income tax benefit (expense) comprises of:


	For the year ended December 31,
	2010			2011			2012
	RMB			RMB			RMB			US$
Current		(10,581	)		(32,169	)		(45,481	)		(7,300	)
Deferred		8,993			18,492			9,322			1,496

		(1,588	)		(13,677	)		(36,159	)		(5,804	)

Reconciliation Tax Computed Applying Statutory Income Tax Rate


	For the year ended December 31,
	2010		2011		2012
	RMB		RMB		RMB		US$
(Loss) profit from continuing operations before income taxes		(233,127)		59,616		93,815		15,056

Income tax benefit (expense) computed at applicable tax rates (25%)		58,282		(14,904)		(23,454)		(3,764)
Non-deductible expenses		(777)		(2,161)		(1,969)		(315)
Taxable income		(11,245)		(1,178)		—		—
Research and development expenses		533		2,982		4,313		692
Effect of tax holidays		3,621		827		—		—
Preferential rate		—		371		7,245		1,163

Current and deferred tax rate differences		553		1,331		1,804		290
International rate differences		(70,503)		(1,020)		(15,716)		(2,523)
Tax exempted income		—		—		2,635		423
Outside basis difference		613		—		—		—
Unrecognized tax benefits		(364)		(856)		(641)		(103)
Deferred tax expense		(105)		—		(3,695)		(593)
Change in valuation allowance		17,804		(32)		(5,263)		(845)
Prior year provision to return true up		—		963		(1,418)		(229)

Income tax expense		(1,588)		(13,677)		(36,159)		(5,804)

Tax Holiday Benefit Per Basic and Diluted Earnings Per Share

The benefit of the tax holiday per basic earnings per share is as follows:


	For the year ended December 31,
	2010		2011		2012
	RMB		RMB		RMB		US$
Basic		0.05		0.005		—		—

Diluted		0.05		0.004		—		—

Significant Components of Deferred Taxes

The significant components of deferred taxes are as follows:


	December 31,
	2011			2012
	RMB			RMB			US$
Deferred tax assets
Current
Allowance for doubtful accounts		314			53			8
Accrued salary and welfare		2,407			3,589			576
Accrued expenses		512			1,403			225

Contingent consideration payables-current		1,727			3,498			562
Deferred government grant		—			67			11
Valuation allowance		(88	)		(25	)		(4	)

Net current deferred tax assets		4,872			8,585			1,378

Non-current
Tax losses		5,333			8,586			1,378
Property and equipment		4,824			7,102			1,140
Deferred government grant		1,281			4,540			729

Contingent consideration payables-non current		5,866			883			142
Others		23			—			—
Valuation allowance		(4,554	)		(9,880	)		(1,586	)

Net non-current deferred tax assets		12,773			11,231			1,803

Total deferred tax assets		17,645			19,816			3,181

Deferred tax liabilities
Non-current
Intangible assets		39,682			41,736			6,699
Capitalized interest		—			2,930			470

Total deferred tax liabilities		39,682			44,666			7,169

Unrecognized Tax Benefits

A roll-forward of unrecognized tax benefits is as follows:


	For the year ended December 31,
	2011		2012
	RMB		RMB			US$
Balance at beginning of year		5,035		25,403			4,077
Reclass to income tax payable		—		(15,931	)		(2,557	)
Additions based on tax positions related to the current year		20,368		830			133

Balance at end of year		25,403		10,302			1,653

DISCONTINUED OPERATIONS (Tables)

12 Months Ended

Dec. 31, 2012

Discontinued Operations


	For the year ended December 31, 2010
	RMB
Net Revenue		3,726
Cost of revenue		(3,846	)

Gross loss		(120	)

Operating expenses:
Sales and marketing expenses		(4,032	)
General and administrative expenses		(8,167	)
Research and development expenses		(3,046	)

Loss before income tax expenses		(15,365	)

Income tax benefit		2,413

Loss from discontinued operations		(12,952	)

Tabular disclosure of disposal groups, which may include the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the classification and carrying value of the assets and liabilities comprising the disposal group, and the segment in which the disposal group was reported. Also may include the amount of adjustments to amounts previously reported in discontinued operations such as resolution of contingencies arising from the disposal transaction or the operations of the component prior to disposal.

Related Party Transactions

RELATED PARTY TRANSACTIONS (Tables)

12 Months Ended

Dec. 31, 2012

The Company had the following related party transactions for the years ended December 31, 2010, 2011 and 2012:


	For the year ended December 31,
	2010		2011		2012
	RMB		RMB		RMB		US$
Rental of office to:
—VEE		51		—		—		—
—BJ Wanwei		60		—		—		—
Services provided to:
—SH Guotong		11,322		8,181		27,171		4,361
—GZ Juliang		1,173		268		—		—
—BJ Wanwei		1,006		—		—		—
—21V BJ		5		3		—		—
—21V FS		4		39		—		—
—Huo Ju Lian He		896		—		—		—
—CE BJ		541		854		1		—
—CE Soft BJ		2		90		215		35
—VEE		1,061		303		—		—
—TJ Yunlifang		—		93		—		—
Services provided by:
—SH Guotong		2,905		2,554		6,639		1,066
—21V NB		149		—		—		—
—Xi’an Tech		—		8,836		5,526		887
Rental of equipment from:
—Xi’an Tech		13,178		897		—		—
—21V NB		—		442		—		—
Purchases of equipment from:
—SH Guotong		—		—		1,812		291
—CE Soft BJ		—		—		515		83
—Xi’an Tech		27,633		39,896		—		—
Sales of property and equipment to:
—BJ Wanwei		4,526		—		—		—
—CE Soft BJ		1,518		—		—		—
—CE BJ		4,396		—		—		—
Sales of intangible assets to:
—CE Soft BJ		466		—		—		—
—CE BJ		428		—		—		—
—21V QD		23		—		—		—
Loans provided to:
—BitCool Media		—		—		14,771		2,371
Interest income from loan to:
—Bitcool Media		—		—		253		41
Issuance of ordinary shares for Chen Sheng’s past services:
—Sunrise (Note 20(b))		206,037		—		—		—


	For the year ended December 31,
	2010		2011		2012
	RMB		RMB		RMB		US$
Acquisition of 21V Xi’an from 21 Vianet Infrastructure Limited (Note 4)		—		—		15,977		2,564
Purchase 10% equity interests of BJ Tele from aBitCool (Note 11)		—		8,200		—		—
Purchase 99.95% equity interests of Shanghai Cloud from 21V FS (Note 4)		—		18,191		—		—
Purchase 0.05% equity interests of Shanghai Cloud from 21V BJ (Note 4)		—		9		—		—
Purchase 100% equity interests of Shenzhen Cloud from 21V FS (Note 4)		—		7,900		—		—

Related Party Balances

The Company had the following related party balances as of December 31, 2011 and 2012:


	December 31,
	2011		2012
	RMB		RMB		US$
Amounts due from related parties:
—SH Guotong		92		3,702		594
—Bitcool Media		—		15,024		2,412
—CE BJ		2		—		—
—CE Soft BJ		9		—		—
—Nanjing Chiguan		2,480		—		—
— Chen Sheng *		4,053		—		—
—Zhang Jun *		12,483		—		—
—Hsiao Shang-Wen *		1,452		—		—
—Xiao Feng *		8,269		—		—
—Lai Ningning *		8,269		—		—
—Wang Yanguo *		2,087		—		—
—Lin Xiaodong *		1,937		—		—
—Li Heyang *		401		—		—
—Li Mei *		109		—		—

		41,643		18,726		3,006

Amounts due to related parties:
Current:
—Tianjin Guanbang (Seller of Gehua)		21,209		39,592		6,355
—Concept Network (Seller of the Managed Network Entities)		43,656		47,755		7,665
—Shi Dai Tong Lian (Seller of the Managed Network Entities)		25,069		—		—
—Xi’an Tech		6,684		—		—
—Beijing Huibang (Seller of Gehua)		—		815		131
—Sellers of Fastweb		—		16,875		2,709

		96,618		105,037		16,860


	December 31,
	2011		2012
	RMB		RMB		US$
Non-current:
—Concept Network (Seller of the Managed Network Entities)		84,277		43,992		7,061
—Sellers of Fastweb		—		35,601		5,715
—Tianjin Guanbang (Seller of Gehua)		40,216		6,723		1,079

		124,493		86,316		13,855

Collectively, “the Nine Executives”

Parent Company

Related Party Transactions

The Company had the following related party transactions for the years ended December 31, 2010, 2011 and 2012:


	For the year ended December 31,
	2010		2011		2012
	RMB		RMB		RMB		US$
Expenses paid on behalf by:
—aBitCool		2,485		—		—		—

Waiver of liability by:
—aBitCool		116,069		—		—		—

Waiver of receivables to:
—21Vianet Technology		28,990		—		—		—
—21Vianet Beijing		20,941		—		—		—

(LOSS) EARNINGS PER SHARE (Tables)

12 Months Ended

Dec. 31, 2012

Basic and Diluted (Loss) Earnings Per Share

Basic and diluted (loss) earnings per share for each of the years presented are calculated as follows:


	For the year ended December 31,
	2010			2011			2012
	RMB			RMB			RMB			US$
*Numerator:*
Net (loss) profit from continuing operations		(234,715	)		45,939			57,656			9,252
Less: net profit attributable to non-controlling interest		(7,722	)		(27,495	)		(1,332	)		(214	)

Net (loss) profit from continuing operations attributable to ordinary shareholders		(242,437	)		18,444			56,324			9,038
Loss from discontinued operations		(12,952	)		—			—			—

Net (loss) profit attributable to ordinary shareholders		(255,389	)		18,444			56,324			9,038

*Denominator:*
Weighted-average number of shares outstanding—basic		71,526,320			259,595,677			342,533,167			342,533,167
Weighted-average number of stock options and RSUs granted in connection with the stock option plan		—			57,211,984			14,251,042			14,251,042
Dilutive effect of preferred shares		110,966,180			—			—			—

Weighted-average number of shares outstanding—diluted		182,492,500			316,807,661			356,784,209			356,784,209

(Loss) earnings per share—Basic:
Net (loss) profit from continuing operations		(3.39	)		0.07			0.16			0.03
Loss from discontinued operations		(0.18	)		—			—			—

		(3.57	)		0.07			0.16			0.03

(Loss) earnings per share—Diluted:
Net (loss) profit from continuing Operations		(3.39	)		0.06			0.16			0.03
Loss from discontinued operations		(0.18	)		—			—			—

		(3.57	)		0.06			0.16			0.03

FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Dec. 31, 2012

Assets and Liabilities Measured at Fair Value on Recurring Basis

Assets / liabilities measured at fair value on a recurring basis are summarized below:


	Fair value measurement at December 31, 2011 using:
	Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Unobservable inputs (Level 3)		Fair value at December 31, 2011
	RMB		RMB		RMB		RMB
Cash equivalents:
— Fixed rate time deposits		5,000		—		—		5,000
Short-term investment:
— Fixed rate time deposits		894,540		—		—		894,540

		899,540		—		—		899,540


	Fair value measurement at December 31, 2011 using:
	Quoted prices in active markets for identical liabilities (Level 1)		Significant other observable inputs (Level 2)		Unobservable inputs (Level 3)		Fair value at December 31, 2011
	RMB		RMB		RMB		RMB
Amounts due to related parties:
— Contingent consideration payable in relation to the acquisition of Managed Network Entities		—		—		153,002		153,002
— Contingent consideration payable in relation to the acquisition of Gehua		—		—		61,425		61,425

		—		—		214,427		214,427


	Fair value measurement at December 31, 2012 using:
	Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Unobservable inputs (Level 3)		Fair value at December 31, 2012
	RMB		RMB		RMB		RMB		US$
Cash equivalents:
— Fixed rate time deposits		20,000		—		—		20,000		3,210
Short-term investment:
— Fixed rate time deposits		222,701		—		—		222,701		35,746

		242,701		—		—		242,701		38,956


	Fair value measurement at December 31, 2012 using:
	Quoted prices in active markets for identical liabilities (Level 1)		Significant other observable inputs (Level 2)		Unobservable inputs (Level 3)		Fair value at December 31, 2012
	RMB		RMB		RMB		RMB		US$
Amounts due to related parties:
— Contingent consideration payable in relation to the acquisition of Managed Network Entities		—		—		91,747		91,747		14,726
— Contingent consideration payable in relation to the acquisition of Gehua		—		—		46,315		46,315		7,434
— Contingent consideration payable in relation to the acquisition of Fastweb		—		—		52,476		52,476		8,424

		—		—		190,538		190,538		30,584

Reconciliation of Liabilities Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs Level Three

The following table presents a reconciliation of all liabilities measured at fair value on a recurring basis using significant unobservable inputs (level 3):


	Contingent consideration payable
	RMB
Fair value at January 1, 2011		136,741
Contingent purchase consideration payable—Managed Network Entities (Note 4)		169,168
Contingent purchase consideration payable—Gehua (Note 4)		77,469
Payment of cash consideration		(82,195	)
Payment of stock consideration (Note 17)		(20,156	)
Reclassification to equity upon resolution of contingencies		(129,785	)
Changes in the fair value		63,185
Transfers in and/or out of Level 3		—

Fair value at December 31, 2011		214,427
Contingent purchase consideration payable—Fastweb (Note 4)		116,040
Changes in the fair value		17,430
Payment of cash consideration		(59,598	)
Reclassification to equity upon resolution of contingencies		(97,761	)
Transfers in and/or out of Level 3		—

Fair value at December 31, 2012		190,538

Fair value at December 31, 2012 (US$)		30,584

Tabular disclosure related to assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a recurring and/or nonrecurring basis in periods after initial recognition. Disclosures include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3) as well as transfers between levels 1 and 2.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19279-110258

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a,b,bb)
-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2C
-URI http://asc.fasb.org/extlink&oid=7578670&loc=SL7498348-110258

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19190-110258

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 32
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 33
-Subparagraph a, b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 6
-Footnote 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability.

Future Minimum Lease Payments Under Non Cancelable Operating Leases

COMMITMENTS AND CONTINGENCIES (Tables)

12 Months Ended

Dec. 31, 2012


	RMB		US$
2013		83,377		13,383
2014		82,202		13,194
2015		79,235		12,718
2016		75,958		12,192
2017 and thereafter		361,019		57,948

		681,791		109,435

Computer and Network Equipment and Construction in Progress

Purchase Commitments

As of December 31, 2012, the Company has the following commitments to purchase certain computer and network equipment and construction in progress:


	RMB		US$
2013		141,740		22,751
2014		4,114		660
2015		4,239		680

		150,093		24,091

Bandwidth and Cabinet Capacity

Purchase Commitments

As of December 31, 2012, the Company had outstanding purchase commitments in relation to bandwidth and cabinet capacity consisting of the following:


	RMB		US$
2013		605,304		97,158
2014		73,083		11,731
2015		29,498		4,735
2016		4,962		796
2017 and thereafter		53,086		8,521

		765,933		122,941

PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION (Tables)

12 Months Ended

Dec. 31, 2012

Condensed Balance Sheets

Condensed balance sheets


	As of December 31,
	2011			2012
	RMB			RMB			US$
ASSETS
Current assets
Cash		34,224			14,097			2,263
Restricted cash		—			190,000			30,497
Short-term investment		894,540			122,701			19,695
Prepaid expenses and other current assets		16,739			18,562			2,979
Amount due from subsidiaries		497,851			980,246			157,340

Total current assets		1,443,354			1,325,606			212,774

Non-current assets
Restricted cash		—			100,000			16,051
Investments		212,110			500,204			80,288

Total non-current assets		212,110			600,204			96,339

Total assets		1,655,464			1,925,810			309,113

LIABILITIES AND SHAREHOLDERS’ EQUITY
Current liabilities:
Accrued expenses and other payables		2,796			2,531			406
Amount due to a subsidiary		114			—			—
Amount due to related parties		—			16,875			2,709

Total current liabilities		2,910			19,406			3,115
Non-current liabilities
Amount due to related parties		—			35,601			5,715

Total non-current liabilities		—			35,601			5,715

Total liabilities		2,910			55,007			8,830

Shareholders’ equity:
Class A Ordinary shares		13			19			3
Class B Ordinary shares		10			4			1
Additional paid-in capital		3,172,372			3,212,927			515,709
Accumulated other comprehensive loss		(57,290	)		(61,232	)		(9,828	)
Accumulated deficit		(1,294,533	)		(1,238,209	)		(198,746	)
Treasury stock		(168,018	)		(42,706	)		(6,856	)

Total shareholders’ equity		1,652,554			1,870,803			300,283

Total liabilities and shareholders’ equity		1,655,464			1,925,810			309,113

Condensed Statements of Operations

Condensed statements of operations


	For the year ended December 31,
	2010			2011			2012
	RMB			RMB			RMB			US$
Operating Expenses
General and administrative expenses		(281,113	)		(49,424	)		(78,611	)		(12,618	)

Operating (loss) profit		(281,113	)		(49,424	)		(78,611	)		(12,618	)
Other (expenses) income		(49,931	)		45,344			10,570			1,694
Investment income		75,655			22,524			124,365			19,962

(Loss) profit before income taxes		(255,389	)		18,444			56,324			9,038
Income tax expense		—			—			—			—

Net (loss) income		(255,389	)		18,444			56,324			9,038

Condensed Statements of Cash Flows

Condensed statements of cash flows


	For the year ended December 31,
	2010		2011			2012
	RMB		RMB			RMB			US$
Net cash used in operating activities		—		(712	)		(6,300	)		(1,011	)
Net cash (used in) generated from investing activities		—		(1,349,501	)		272,873			43,799
Net cash generated from (used in) financing activities		1,537		1,382,900			(286,700	)		(46,019	)

Net increase (decrease) in cash		1,537		32,687			(20,127	)		(3,231	)
Cash at beginning of the year		—		1,537			34,224			5,494

Cash at end of the year		1,537		34,224			14,097			2,263

Parent Company

Related Party Balance

The Company had the following related party balances as of December 31, 2011 and 2012:


	December 31,
	2011		2012
	RMB		RMB		US$
Amount due from subsidiaries
—21Vianet HK		484,442		968,866		155,514
—21Vianet Beijing		13,409		11,380		1,826

		497,851		980,246		157,340

Amount due to subsidiaries
—21Vianet Technology		66		—		—
—ZBXT		48		—		—

		114		—		—

Amount due to related parties
Current
—Sellers of Fastweb		—		16,875		2,709
Non-current
—Sellers of Fastweb		—		35,601		5,715

		—		52,476		8,424

Organization - Additional Information (Detail) $ / shares in Units, ¥ in Thousands	1 Months Ended					12 Months Ended
	Apr. 30, 2011 CNY (¥) shares	Oct. 31, 2010 USD ($) shares	Oct. 31, 2010 CNY (¥) shares	Mar. 31, 2010 CNY (¥)	Apr. 30, 2009 CNY (¥)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)	Dec. 31, 2010 CNY (¥) Entity	Dec. 31, 2008 CNY (¥) Entity	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Apr. 30, 2011 $ / shares	Feb. 28, 2011 $ / shares	Jan. 31, 2011 $ / shares	Jan. 31, 2011 CNY (¥)	Feb. 21, 2010 USD ($)	Jan. 13, 2010 HKD ($)
Organization [Line Items]
Share price \| $ / shares													$ 1.33	$ 1.24
Number of ordinary shares in each American Depositary Shares (ADS) \| shares	6
Net proceeds from issuance of ordinary shares upon IPO							¥ 1,332,904
Deemed contribution from the shareholders for the legal disposal of certain carved-out entities								¥ 39,300
Waiver of liability from the shareholder								116,069
aBitCool Incorporated
Organization [Line Items]
Waiver of liability from the shareholder		$ 17,465,000	¥ 115,266
aBitCool Incorporated \| Internet Data Center Services
Organization [Line Items]
Percentage of outstanding number of preferred aBitCool		85.00%	85.00%
Option Agreement
Organization [Line Items]
Agreement agreement between 21Vianet China and the 21Vianet Technology, term						10 years
Agreement agreement between 21Vianet China and the 21Vianet Technology, expiration date						Dec. 18, 2016
Technical Consulting and Service Agreement
Organization [Line Items]
Agreement agreement between 21Vianet China and the 21Vianet Technology, term						10 years
Agreement agreement between 21Vianet China and the 21Vianet Technology, expiration date						Dec. 18, 2016
Service fee per hour						¥ 1
Loan Agreement \| Loan one
Organization [Line Items]
Loan facility provided to related parties															¥ 7,000
Loan Agreement \| Loan Two
Organization [Line Items]
Loan facility provided to related parties															¥ 3,000
Computer and network equipment
Organization [Line Items]
Pledged computer and network equipment, carrying amount							¥ 20,000			$ 7,435,000	¥ 46,320
21Vianet Group Limited ("21Vianet HK") \| aBitCool Incorporated
Organization [Line Items]
Business acquisition, acquisition percentage																	100.00%
Business acquisition, consideration transferred \| $																	$ 1
21Vianet Data Center Co., Ltd. ("21Vianet China") \| aBitCool Incorporated
Organization [Line Items]
Business acquisition, acquisition percentage																100.00%
Business acquisition, consideration transferred \| $																$ 1
SH Guotong
Organization [Line Items]
Cash consideration of Legal disposal to nominee shareholders of aBitCool					¥ 68,960
Repurchase of IDC Business' long-lived assets, employees, and sales agreements from nominee shareholders				¥ 1,426
Deemed Distribution to Shareholders for Accounting Disposal				27,869
GZ Juliang
Organization [Line Items]
Cash consideration of Legal disposal to nominee shareholders of aBitCool				10,000
Repurchase of IDC Business' long-lived assets, employees, and sales agreements from nominee shareholders				858
Deemed Distribution to Shareholders for Accounting Disposal				¥ 2,764
Beijing 21ViaNet Broadband Data Center Co., Ltd ("21Vianet Beijing")
Organization [Line Items]
Deemed Distribution to Shareholders for Accounting Disposal									¥ 36,000
Number of entities with deemed distribution to shareholders \| Entity									2
Beijing 21ViaNet Broadband Data Center Co., Ltd ("21Vianet Beijing") \| Carved Out Subsidiaries
Organization [Line Items]
Deemed contribution from the shareholders for the legal disposal of certain carved-out entities								¥ 36,000
Number of carved-out entities disposed \| Entity								2
Beijing aBitCool Network Technology Co., Ltd. ("21Vianet Technology") \| Carved Out Associate
Organization [Line Items]
Deemed contribution from the shareholders for the legal disposal of certain carved-out entities								¥ 3,300
Number of carved-out entities disposed \| Entity								1
American Depositary Shares
Organization [Line Items]
Ordinary shares issued \| shares	14,950,000
Share price \| $ / shares												$ 15
Net proceeds from issuance of ordinary shares upon IPO	¥ 1,332,904
Common Stock \| aBitCool Incorporated
Organization [Line Items]
Ordinary shares issued \| shares		71,526,320	71,526,320
Redeemable Convertible Preferred Stock \| aBitCool Incorporated
Organization [Line Items]
Convertible preferred shares, issued \| shares		110,966,180	110,966,180

Summary of Company Subsidiaries and Its Consolidated Variable Interest Entities (Detail)

12 Months Ended

Dec. 31, 2012

Beijing aBitCool Network Technology Co., Ltd. ("21Vianet Technology") | Variable Interest Entities

Oct. 22, 2002

^[1],[2]

PRC

^[1],[2]

Subsidiaries | 21Vianet Group Limited ("21Vianet HK")

Provision of internet data center and managed network services

^[1],[2]

May 25, 2007

Hong Kong

100.00%

Subsidiaries | 21Vianet Data Center Co., Ltd. ("21Vianet China")

Investment holding

Jun. 12, 2000

^[2]

PRC

^[2]

100.00%

^[2]

Subsidiaries | Fastweb International Holdings

Provision of technical and consultation services and rental of long-lived assets

^[2]

Sep. 09, 2012

^[3]

Cayman Islands

^[3]

100.00%

^[3]

Subsidiaries | Hongkong Fastweb Holdings Company

Investment holding

^[3]

Sep. 09, 2012

^[3]

Hong Kong

^[3]

100.00%

^[3]

Subsidiaries | Beijing Fastweb Technology Company Limited

Investment holding

^[3]

Sep. 09, 2012

^[2],[3]

PRC

^[2],[3]

100.00%

^[2],[3]

Subsidiaries | Foshan Technology

Dormant Company

^[2],[3]

Dec. 20, 2011

^[2]

PRC

^[2]

100.00%

^[2]

Subsidiaries | 21Vianet Anhui Suzhou Technology Co., Ltd.("Suzhou Technology")

Trading of network equipment

^[2]

Nov. 16, 2011

^[2]

PRC

^[2]

100.00%

^[2]

Subsidiaries | 21ViaNet@Xian Holding Limited ("21V Xi'an Holding")

Trading of network equipment

^[2]

Jul. 05, 2012

^[4]

British Virgin Islands

^[4]

100.00%

^[4]

Subsidiaries | 21Vianet (Xi'an) Technology Co., Ltd. ("Xi'an Tech")

Investment holding

^[4]

Jul. 05, 2012

^[2],[4]

PRC

^[2],[4]

100.00%

^[2],[4]

Held Directly by 21 Vianet Technology | Beijing 21ViaNet Broadband Data Center Co., Ltd ("21Vianet Beijing") | Variable Interest Entities

Provision of internet data center

^[2],[4]

Mar. 15, 2006

^[1],[2]

PRC

^[1],[2]

Held Directly by 21 Vianet Beijing | Shanghai Wantong Vianet Information Technology Company Limited | Variable Interest Entities

Provision of internet data center and managed network services

^[1],[2]

Feb. 20, 2008

^[1],[2]

PRC

^[1],[2]

Held Directly by 21 Vianet Beijing | 21 Vianet Xian Information Outsourcing Industry Park Services Co., Ltd (Xi'an Sub) | Variable Interest Entities

Provision of internet data center services

^[1],[2]

Jun. 23, 2008

^[1],[2]

PRC

^[1],[2]

Held Directly by 21 Vianet Beijing | Beijing Chengyishidai Network Technology Co., Ltd. (CYSD) | Variable Interest Entities

Provision of internet data center services

^[1],[2]

Sep. 30, 2010

^[1],[2],[5]

PRC

^[1],[2],[5]

Held Directly by 21 Vianet Beijing | Zhiboxintong Beijing Network Technology Co., Ltd (ZBXT) | Variable Interest Entities

Provision of managed network services

^[1],[2],[5]

Sep. 30, 2010

^[1],[2],[5]

PRC

^[1],[2],[5]

Held Directly by 21 Vianet Beijing | Beijing Bozhiruihai Network Technology Co., Ltd. | Variable Interest Entities

Provision of managed network services

^[1],[2],[5]

Sep. 30, 2010

^[1],[2],[5]

PRC

^[1],[2],[5]

Held Directly by 21 Vianet Beijing | Beijing Bikonghengtong Network Technology Co., Ltd. | Variable Interest Entities

Provision of managed network services

^[1],[2],[5]

Sep. 30, 2010

^[1],[2],[5]

PRC

^[1],[2],[5]

Held Directly by 21 Vianet Beijing | Xingyunhengtong Beijing Network Technology Company Limited | Variable Interest Entities

Provision of managed network services

^[1],[2],[5]

Sep. 30, 2010

^[1],[2],[5]

PRC

^[1],[2],[5]

Held Directly by 21 Vianet Beijing | Fuzhou Yongjiahong Communication Technology Company Limited | Variable Interest Entities

Provision of managed network services

^[1],[2],[5]

Sep. 30, 2010

^[1],[2],[5]

PRC

^[1],[2],[5]

Held Directly by 21 Vianet Beijing | Jiu Jiang Zhongyatonglian Network Technology Co., Ltd. | Variable Interest Entities

Provision of managed network services

^[1],[2],[5]

Nov. 16, 2010

^[1],[2],[5]

PRC

^[1],[2],[5]

Held Directly by 21 Vianet Beijing | Guangzhou Gehua Network Technology and Development Co., ("Gehua") | Variable Interest Entities

Provision of managed network services

^[1],[2],[5]

Oct. 08, 2011

^[1],[2]

PRC

^[1],[2]

Held Directly by 21 Vianet Beijing | Shanghai Cloud 21Vianet Network Co., Ltd. ("Shanghai Cloud") | Variable Interest Entities

Provision of managed network services

^[1],[2]

Oct. 01, 2011

^[1],[2]

PRC

^[1],[2]

Held Directly by 21 Vianet Beijing | Shenzhen Cloud Information Technology Co., Ltd. ("Shenzhen Cloud") | Variable Interest Entities

Dormant Company

^[1],[2]

Oct. 27, 2011

^[1],[2]

PRC

^[1],[2]

Held Directly by 21 Vianet Beijing | Langfang Xunchi Computer Data Processing Co., Ltd. ("Langfang Xunchi") | Variable Interest Entities

Dormant Company

^[1],[2]

Dec. 19, 2011

^[1],[2]

PRC

^[1],[2]

Held Directly by 21 Vianet Beijing | Beijing Fastweb Network Technology Co., Ltd. ("Fastweb Network BJ") | Variable Interest Entities

Dormant Company

^[1],[2]

Sep. 09, 2012

^[1],[2],[3]

PRC

^[1],[2],[3]

Held Directly by 21 Vianet Beijing | Shanghai Fawei Technology Co., Ltd. (SH Fawei) | Variable Interest Entities

Provision of internet data center and internet content delivery network services

^[1],[2],[3]

Jul. 18, 2008

^[1],[2],[3]

PRC

^[1],[2],[3]

Held Directly by 21 Vianet Beijing | Suzhou Fastweb Technology Co., Ltd. (SZ Fastweb) | Variable Interest Entities

Internet data center, content delivery network and related services

^[1],[2],[3]

Feb. 01, 2010

^[1],[2],[3]

PRC

^[1],[2],[3]

Held Directly by 21 Vianet Beijing | Hangzhou Zhentuo Information Technology Co., Ltd. (HZ Zhentuo) | Variable Interest Entities

Dormant Company

^[1],[2],[3]

Aug. 16, 2012

^[1],[2],[6]

PRC

^[1],[2],[6]

Held Directly by 21 Vianet Beijing | Shanghai Xiangyun 21Vianet Network Technology Company Limited (SH Xiangyun)

Dormant Company

^[1],[2],[6]

Oct. 22, 2012

^[1],[2],[7]

PRC

^[1],[2],[7]

Dormant Company

^[1],[2],[7]

[1]	Collectively "Consolidated VIE"
[2]	Collectively "PRC Subsidiaries"
[3]	On September 9, 2012, the Company and its subsidiary, 21Vianet Beijing, acquired 100% equity interests in these entities (collectively referred to as "Fastweb") (Note 4).
[4]	On July 5, 2012, the Company through its wholly-owned subsidiary, 21Vianet HK, acquired 100% equity interests in these entities (collectively referred to as "21V Xi'an") from 21 Vianet Infrastructure Limited, a subsidiary of aBitCool Inc. ("aBitCool") (Note 4).
[5]	Collectively "Managed Network Entities"
[6]	On August 16, 2012, HZ Zhentuo was incorporated in Hangzhou in the PRC by 21Vianet Beijing as a wholly-owned subsidiary.
[7]	On October 22, 2012, SH Xiangyun was incorporated in Shanghai in the PRC by 21Vianet Beijing as a wholly-owned subsidiary.

Summary of Company Subsidiaries and Its Consolidated Variable Interest Entities (Parenthetical) (Detail)	Sep. 09, 2012	Jul. 05, 2012
Fastweb Acquisition
Variable Interest Entity [Line Items]
Business acquisition, equity interests acquired	100.00%
Fastweb International Holdings \| Fastweb Acquisition \| Subsidiaries
Variable Interest Entity [Line Items]
Business acquisition, equity interests acquired	100.00%
Hongkong Fastweb Holdings Company \| Fastweb Acquisition \| Subsidiaries
Variable Interest Entity [Line Items]
Business acquisition, equity interests acquired	100.00%
Beijing Fastweb Technology Company Limited \| Fastweb Acquisition \| Subsidiaries
Variable Interest Entity [Line Items]
Business acquisition, equity interests acquired	100.00%
21ViaNet@Xian Holding Limited ("21V Xi'an Holding") \| 21V Xi'an \| Subsidiaries
Variable Interest Entity [Line Items]
Business acquisition, equity interests acquired		100.00%
Beijing Fastweb Network Technology Co., Ltd. ("Fastweb Network BJ") \| Fastweb Acquisition \| Held Directly by 21 Vianet Beijing
Variable Interest Entity [Line Items]
Business acquisition, equity interests acquired	100.00%

Consolidated VIE Included in Accompanying Consolidated Financial Statements (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)	Dec. 31, 2010 CNY (¥)	Dec. 31, 2012 CNY (¥)
Variable Interest Entity [Line Items]
Total assets	$ 477,831		¥ 2,402,952		¥ 2,976,919
Total liabilities	174,578		733,228		1,087,614
Net revenues	244,644	¥ 1,524,158	1,020,929	¥ 525,203
Net profit	9,252	57,656	45,939	(247,667)
Net cash provided by operating activities	27,917	173,923	166,135	81,372
Net cash used in investing activities	(28,197)	(175,670)	(1,268,054)	(616)
Net cash provided by financing activities	3,844	23,952	1,443,947	(69,498)
Variable Interest Entities
Variable Interest Entity [Line Items]
Total assets	261,666		1,165,210		1,630,208
Total liabilities	149,281		704,879		¥ 930,038
Net revenues	244,644	1,524,158	1,020,929	525,203
Net profit	19,671	122,552	51,566	30,668
Net cash provided by operating activities	27,175	169,304	150,739	80,663
Net cash used in investing activities	(32,916)	(205,069)	(224,704)	(616)
Net cash provided by financing activities	$ 17,668	¥ 110,076	¥ 86,109	¥ 41,835

The net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. Operating activities generally involve producing and delivering goods and providing services. Operating activity cash flows include transactions, adjustments, and changes in value that are not defined as investing or financing activities. While for technical reasons this element has no balance attribute, the default assumption is a debit balance consistent with its label.

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

Summary of Significant Accounting Policies - Additional Information (Detail) ¥ in Thousands, $ in Thousands	1 Months Ended	12 Months Ended
	Jul. 31, 2012 shares	Dec. 31, 2012 USD ($) Segment	Dec. 31, 2012 CNY (¥) Segment	Dec. 31, 2011 USD ($) shares	Dec. 31, 2011 CNY (¥) shares	Dec. 31, 2010 CNY (¥)
Significant Accounting Policies [Line Items]
Official exchange rate of foreign currency remeasured (RMB per one U.S. dollar)		6.2301	6.2301
Interest capitalized		$ 1,881	¥ 11,718		¥ 5,037
Cash flows estimated growth rate after six years using terminal value		3.00%	3.00%
Discount rate used in the valuations based on weighted average cost of capital		13.50%	13.50%
Business Tax Expense		$ 9,006	¥ 56,106		42,241	¥ 20,519
Advertising expense		$ 710	¥ 4,426		¥ 3,159	¥ 3,468
Estimated forfeiture rate for management and non-management employees		0.00%	0.00%	0.00%	0.00%
Share Repurchase Plan, shares repurchased \| shares	2,686,965
Share Repurchase Plan, consideration \| ¥					¥ 190,022
Number of Operating Segment \| Segment		1	1
American Depository Shares
Significant Accounting Policies [Line Items]
Share Repurchase Plan, shares repurchased \| shares				3,022,532	3,022,532
Share Repurchase Plan, consideration \| $				$ 29,918
Beijing 21ViaNet Broadband Data Center Co., Ltd ("21Vianet Beijing")
Significant Accounting Policies [Line Items]
Business Tax Rate		5.00%	5.00%
21Vianet Xi'an BPO Service Co., Ltd. ("Xi'an Sub")
Significant Accounting Policies [Line Items]
Business Tax Rate		5.00%	5.00%
Xingyunhengtong Beijing Network Technology Company Limited
Significant Accounting Policies [Line Items]
Business Tax Rate		5.00%	5.00%
Other PRC subsidiaries and Consolidated VIE
Significant Accounting Policies [Line Items]
Business Tax Rate		3.00%	3.00%
Maximum
Significant Accounting Policies [Line Items]
Cash equivalent maturity period		90 days	90 days
Short-term investment maturity period		365 days	365 days
Maximum \| American Depository Shares
Significant Accounting Policies [Line Items]
Share Repurchase Plan, maximum value \| $				$ 30,000
Minimum
Significant Accounting Policies [Line Items]
Short-term investment maturity period		90 days	90 days
Minimum \| Capital Leases
Significant Accounting Policies [Line Items]
Capital lease recognition condition, lease term as a percentage of estimated remaining economic life		75.00%	75.00%
Capital lease recognition condition, minimum lease payments at the beginning of the lease term as a percentage of the fair value of the leased property		90.00%	90.00%

Estimated Useful Lives of Property and Equipment (Detail)	12 Months Ended
	Dec. 31, 2012
Buildings
Property Plant and Equipment Estimated Useful Lives [Line Items]
Property and equipment, estimated useful life	25 years
Leasehold improvements
Property Plant and Equipment Estimated Useful Lives [Line Items]
Property and equipment, estimated useful life	Over the shorter of lease term or the estimated useful lives of the assets
Optical fibers
Property Plant and Equipment Estimated Useful Lives [Line Items]
Property and equipment, estimated useful life	20 years
Computer and network equipment
Property Plant and Equipment Estimated Useful Lives [Line Items]
Property and equipment, estimated useful life	5 years
Office equipment
Property Plant and Equipment Estimated Useful Lives [Line Items]
Property and equipment, estimated useful life	5 years
Motor vehicles
Property Plant and Equipment Estimated Useful Lives [Line Items]
Property and equipment, estimated useful life	5 years

Weighted Average Useful Lives of Intangible Assets (Detail)

12 Months Ended

Dec. 31, 2012

Purchased software

4 years 10 months 24 days

Radio Spectrum License

15 years

Network Use Right

20 years

Contract Backlog

1 year 1 month 6 days

^[1]

Customer Relationships

7 years 3 months 18 days

^[1]

Supplier Relationships

9 years 6 months

^[1]

Licenses

15 years

^[1]

Trade Names

15 years

^[1]

Platform Software

5 years

^[1]

[1]	Acquired in the acquisition of SH Guotong, the Managed Network Entities, Gehua and Fastweb (Note 4).

Concentration of Risks - Additional Information (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($) Customer	Dec. 31, 2011 USD ($) Customer	Dec. 31, 2010 Customer	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)
Concentration Risk [Line Items]
Appreciation of RMB against US$	0.20%	4.90%	3.00%
PRC
Concentration Risk [Line Items]
Cash and cash equivalents and short-term investments, deposited with major financial institution	$ 50,616			¥ 315,340	¥ 225,731
Outside the PRC
Concentration Risk [Line Items]
Cash and cash equivalents and short-term investments, deposited with major financial institution	$ 120,866	$ 172,195		¥ 753,010
Purchases
Concentration Risk [Line Items]
Concentration of risk, percentage	23.00%	31.00%	40.00%
Sales Revenue, Services, Net \| Customer Concentration Risk
Concentration Risk [Line Items]
Concentration of risk, percentage	22.00%	28.00%	32.00%
Number of customers who contributed more than 4% of Company's revenue	0	0	0
Sales Revenue, Services, Net \| Customer Concentration Risk \| Maximum
Concentration Risk [Line Items]
Percentage of revenue from largest single customer	5.00%	5.00%	5.00%

Acquisitions - Additional Information (Detail)
¥ in Thousands, $ in Thousands

1 Months Ended

12 Months Ended

Oct. 31, 2012

CNY (¥)

Sep. 30, 2012

CNY (¥)

May 31, 2012

CNY (¥)

Dec. 31, 2011

CNY (¥)

Dec. 31, 2012

CNY (¥)

Dec. 31, 2012

USD ($)

Dec. 31, 2012

CNY (¥)

Nov. 30, 2012

USD ($)

Sep. 20, 2012

USD ($)

Sep. 09, 2012

CNY (¥)

Jul. 31, 2012

CNY (¥)

Jul. 02, 2012

CNY (¥)

Dec. 15, 2011

CNY (¥)

Oct. 27, 2011

CNY (¥)

Oct. 19, 2011

CNY (¥)

Oct. 01, 2011

CNY (¥)

Sep. 30, 2010

CNY (¥)

21V Xi'an

Revenue since acquisition date

¥ 15,977

Net profit (loss) since acquisition date

(2,942)

Revenue since acquisition date

^[1]

¥ 33,395

34,356

Net profit (loss) since acquisition date

¥ 6,556

100.00%

Fastweb Acquisition | Contract Backlog

¥ 116,040

Cash consideration paid

¥ 9,373

¥ 7,502

Fastweb Acquisition | Customer Relationship

1 year

Fastweb Acquisition | Supplier Relationships

7 years

Fastweb Acquisition | Platform Software

1 year

5 years

iJoy Holding Limited

Business acquisition, equity interests intend to acquire

100.00%

Loan facility provided to related parties | $

$ 2,000

$ 50

iJoy Holding Limited | Maximum

Business acquisition, total purchase consideration | $

$ 22,000

Managed Network Entities

¥ 50,000

51.00%

Managed Network Entities | Equity Method Investments

¥ 169,168

¥ 172,439

Cash consideration paid

¥ 2,542

¥ 67,375

Business acquisition, fair value of call option

¥ 6,765

Business acquisition, acquisition of remaining equity interests

49.00%

Business acquisition, difference between fair value of purchase consideration and carrying amount of non-controlling interest

¥ 42,288

Shanghai Cloud 21Vianet Network Co., Ltd. ("Shanghai Cloud")

Shanghai Cloud 21Vianet Network Co., Ltd. ("Shanghai Cloud") | Held Directly by 21 Vianet Technology

¥ 18,200

Shanghai Cloud 21Vianet Network Co., Ltd. ("Shanghai Cloud") | Held Directly by 21 Vianet Beijing

99.95%

Shenzhen Cloud Information Technology Co., Ltd. ("Shenzhen Cloud") | Held Directly by 21 Vianet Beijing

0.05%

100.00%

Guangzhou Gehua Network Technology and Development Co., ("Gehua")

¥ 7,900

^[2]

¥ 14,820

100.00%

¥ 77,469

[1]	RMB7,502 and RMB 9,373 of the above cash consideration was paid in September and October 2012, respectively. The remaining balance of RMB16,875 of cash consideration has been paid in 2013.
[2]	The cash consideration of RMB14,820 was paid in October 2011.

Estimated Fair Values of Assets Acquired and Liabilities Assumed as of Date of Acquisition (21V Xi'an) (Detail) ¥ in Thousands, $ in Thousands	1 Months Ended	12 Months Ended
	Jul. 31, 2012 CNY (¥)	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Jul. 02, 2012 CNY (¥)
Net assets acquired
Bargain purchase gain recognized		$ (1,692)	¥ (10,539)
21V Xi'an
Net assets acquired
Current assets	¥ 7,284
Property and equipment, net	24,820
Other payables	(2,761)
Deferred tax liability	(2,437)
Total net assets acquired	26,516
Purchase consideration	15,977			¥ 15,977
Bargain purchase gain recognized	(10,539)
21V Xi'an \| Due to related parties
Net assets acquired
Other payables	¥ (390)

Purchase Consideration (Detail) - CNY (¥)
¥ in Thousands

Dec. 31, 2012

Sep. 09, 2012

Dec. 15, 2011

Oct. 19, 2011

Sep. 30, 2010

Contingent ordinary share issuance

^[1]

¥ 33,395

^[2],[3]

82,645

¥ 116,040

Managed Network Entities

Contingent ordinary share issuance

¥ 50,000

¥ 99,251

75,494

^[4],[5],[6]

Contingent cash consideration

169,168

172,439

¥ 69,917

¥ 38,536

^[5],[6]

Guangzhou Gehua Network Technology and Development Co., ("Gehua")

Contingent ordinary share issuance

^[7]

¥ 14,820

^[8],[9]

46,700

Contingent cash consideration

77,469

^[8],[10]

¥ 15,949

[1]	RMB7,502 and RMB 9,373 of the above cash consideration was paid in September and October 2012, respectively. The remaining balance of RMB16,875 of cash consideration has been paid in 2013.
[2]	The Company determined the fair value of the contingent share consideration with the assistance of an independent third party valuation firm.
[3]	The contingent share consideration is determined based on the achievement by Fastweb of certain financial targets in accordance with the sales and purchase agreement for the fiscal years 2012 and 2013 as well as compliance to the terms of the sales and purchase agreement. The above contingent consideration amounts were derived from the Company's assessment of whether Fastweb will meet the contractually stipulated targets. As the contingent consideration in shares is not considered to be indexed to its own shares since the settlement amount is determined based on the agreed targets, it is liability-classified and is remeasured at the end of each reporting period with an adjustment for fair value recorded to the current period expense. As the contingency with respect to the financial targets for the fiscal year 2012 was resolved, the corresponding portion of the contingent consideration in shares was remeasured on December 31, 2012, with its fair value of RMB41,197 reclassified to additional paid in capital. The remaining contingent consideration related to fiscal 2013 has been recorded in the "Amount due to related parties" balance within the Company's statement of financial position (Note 23).
[4]	In accordance with the sales and purchase agreement, if the option to acquire the Company's ordinary shares per (ii) above is exercised, any contingent consideration payable in shares, if and when the stipulated targets are achieved, would be reduced by the number of shares issued through the exercise of that option. As such, the valuation of the contingent consideration payable in shares represents the fair value of the contingent share consideration payable that is in excess of the shares issuable as discussed in (ii) above. As the contingent consideration in shares is not considered to be indexed to its own shares since the settlement amount is determined based on the agreed targets discussed in (iii) above, it is liability-classified and is remeasured at the end of each reporting period with an adjustment for fair value recorded to the current period expense. As the contingencies with respect to the financial targets for fiscal years 2011 and 2012 were resolved, the corresponding portions of the contingent consideration in shares were remeasured on December 31, 2011 and 2012, respectively, with their fair values reclassified to additional paid in capital.
[5]	The Company determined the fair value of the contingent consideration in cash and ordinary shares, the option to acquire the Company's ordinary shares and the call option with the assistance of an independent third party valuation firm.
[6]	The contingent consideration in both cash and shares are annually determined based on the achievement by the Managed Network Entities of certain financial targets in accordance with the sales and purchase agreement for the fiscal years 2011, 2012 and 2013, as well as the successful negotiation of a country-wide fiber optic lease agreement with a specific third party that is critical to the expansion of their business. The above contingent consideration amounts were derived from the Company's assessment of whether the Managed Network Entities will meet the certain contractually stipulated targets. Such contingent consideration amounts still outstanding have been recorded in the "Amount due to related parties" balance within the Company's statement of financial position (Note 23).
[7]	The cash consideration of RMB14,820 was paid in October 2011.
[8]	The Company determined the fair value of the contingent consideration in cash and ordinary shares with the assistance of an independent third party valuation firm.
[9]	The contingent consideration in shares is determined based on the achievement by Gehua of certain financial targets in accordance with the sales and purchase agreement for the periods from September 1, 2011 to December 31, 2011, from September 1, 2011 to August 31, 2013 and the operating effectiveness of the fiber optic lease arrangement acquired as part of this acquisition for the period up to August 15, 2014. As the contingent consideration in shares is not considered to be indexed to its own shares since the settlement amount is determined based on the agreed targets, it is liability-classified and is remeasured at the end of each reporting period with an adjustment for fair value recorded to the current period expense. Such contingent consideration amounts still outstanding have been recorded in the "Amount due to related parties" balance within the Company's statement of financial position. As the contingency with respect to the financial targets for the period from September 1, 2011 to December 31, 2011 has been resolved, the corresponding portion of the contingent consideration in shares was remeasured on December 31, 2011, with its fair value reclassified to additional paid in capital.
[10]	The contingent cash consideration is determined based on the achievement by Gehua of certain financial targets for the period from September 1, 2011 to August 31, 2012. The above contingent consideration amounts were derived from the Company's assessment of whether Gehua will meet the certain contractually stipulated targets. Such amounts were fully paid by February 2013, as the contingency was resolved in 2012.

The acquisition-date fair value of the equity interests of the acquirer, including the number of instruments or interests issued or issuable in consideration for the business combination.

Purchase Consideration (Parenthetical) (Detail)
¥ in Thousands, $ in Thousands

1 Months Ended

Oct. 31, 2012

CNY (¥)

Sep. 30, 2012

CNY (¥)

Dec. 31, 2012

USD ($)

Dec. 31, 2012

CNY (¥)

Oct. 19, 2011

CNY (¥)

Cash consideration payable

Cash consideration paid

¥ 9,373

¥ 7,502

¥ 16,875

Fair value of contingent consideration in shares

$ 6,613

41,197

Business acquisition, cash consideration

^[1]

¥ 33,395

Guangzhou Gehua Network Technology and Development Co., ("Gehua")

Business acquisition, cash consideration

^[2]

¥ 14,820

[1]	RMB7,502 and RMB 9,373 of the above cash consideration was paid in September and October 2012, respectively. The remaining balance of RMB16,875 of cash consideration has been paid in 2013.
[2]	The cash consideration of RMB14,820 was paid in October 2011.

Aggregate carrying amount of current liabilities (due within one year or within the normal operating cycle if longer) not separately disclosed in the balance sheet. Includes costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered and of liabilities not separately disclosed.

Summary of Estimated Fair Values of Assets Acquired and Liabilities Assumed (Detail) - Fastweb Acquisition ¥ in Thousands	Sep. 09, 2012 CNY (¥)
Business Acquisition [Line Items]
Current assets	¥ 25,042
Property and equipment, net	11,333
Deferred tax assets	1,450
Total assets acquired	64,030
Accounts payable	7,237
Current liabilities	13,454
Deferred tax liabilities, non-current	6,551
Total liabilities assumed	27,242
Net assets acquired	36,788
Purchase consideration	116,040
Goodwill	79,252
Contract Backlog
Business Acquisition [Line Items]
Business combination, intangible assets	1,850
Customer Relationships
Business Acquisition [Line Items]
Business combination, intangible assets	13,500
Supplier Relationships
Business Acquisition [Line Items]
Business combination, intangible assets	1,955
Platform Software
Business Acquisition [Line Items]
Business combination, intangible assets	¥ 8,900

Unaudited Pro Forma Consolidated Financial Information (Detail) ¥ / shares in Units, $ / shares in Units, ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($) $ / shares	Dec. 31, 2012 CNY (¥) ¥ / shares	Dec. 31, 2011 CNY (¥) ¥ / shares
Business Acquisition [Line Items]
Net revenue	$ 252,792	¥ 1,574,918	¥ 1,076,518
Net profit	$ 8,019	¥ 49,957	¥ 42,498
Earnings per share basic (RMB) \| (per share)	$ 0.02	¥ 0.14	¥ 0.06

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

Purchase Consideration for Acquiring Equity Interest in CYSD and ZBXT (Detail) - Managed Network Entities - CNY (¥)
¥ in Thousands

Dec. 15, 2011

Sep. 30, 2010

Contingent consideration in cash

^[1]

¥ 50,000

¥ 69,917

38,536

^[2],[3]

Contingent ordinary shares issuance

99,251

75,494

^[2],[3],[4]

Option to acquire the Company's ordinary shares

^[2],[5]

15,174

Less: Call option to purchase the remaining 49% equity interest in the Managed Network Entities

^[5]

(6,765)

¥ 169,168

¥ 172,439

[1]	The cash consideration of RMB50,000 was paid in September 2010.
[2]	The Company determined the fair value of the contingent consideration in cash and ordinary shares, the option to acquire the Company's ordinary shares and the call option with the assistance of an independent third party valuation firm.
[3]	The contingent consideration in both cash and shares are annually determined based on the achievement by the Managed Network Entities of certain financial targets in accordance with the sales and purchase agreement for the fiscal years 2011, 2012 and 2013, as well as the successful negotiation of a country-wide fiber optic lease agreement with a specific third party that is critical to the expansion of their business. The above contingent consideration amounts were derived from the Company's assessment of whether the Managed Network Entities will meet the certain contractually stipulated targets. Such contingent consideration amounts still outstanding have been recorded in the "Amount due to related parties" balance within the Company's statement of financial position (Note 23).
[4]	In accordance with the sales and purchase agreement, if the option to acquire the Company's ordinary shares per (ii) above is exercised, any contingent consideration payable in shares, if and when the stipulated targets are achieved, would be reduced by the number of shares issued through the exercise of that option. As such, the valuation of the contingent consideration payable in shares represents the fair value of the contingent share consideration payable that is in excess of the shares issuable as discussed in (ii) above. As the contingent consideration in shares is not considered to be indexed to its own shares since the settlement amount is determined based on the agreed targets discussed in (iii) above, it is liability-classified and is remeasured at the end of each reporting period with an adjustment for fair value recorded to the current period expense. As the contingencies with respect to the financial targets for fiscal years 2011 and 2012 were resolved, the corresponding portions of the contingent consideration in shares were remeasured on December 31, 2011 and 2012, respectively, with their fair values reclassified to additional paid in capital.
[5]	The Company issued an option to the Seller to acquire RMB25,000 of its ordinary shares at a fixed exercise price of US$8.61 per share, exercisable at any time through June 2012. As the option is indexed to the RMB:USD currency index in addition to its own shares, it is liability-classified and is remeasured at the end of each reporting period with an adjustment to fair value recorded to the results of operations with a corresponding credit in the "Amount due to related parties" balance within the Company's statement of financial position (Note 23).

The acquisition-date fair value of the equity interests of the acquirer, including the number of instruments or interests issued or issuable in consideration for the business combination.

Purchase Consideration for Acquiring Equity Interest in CYSD and ZBXT (Parenthetical) (Detail) - Managed Network Entities ¥ in Thousands	Dec. 31, 2012 CNY (¥) $ / Right	Sep. 30, 2010 CNY (¥)
Business Acquisition [Line Items]
Business acquisition, cash consideration		¥ 50,000
Business acquisition, options issued to acquire ordinary shares	¥ 25,000
Business acquisition, exercise price of options issued \| $ / Right	8.61

Accounts Receivable and Allowance for Doubtful Accounts (Detail) ¥ in Thousands, $ in Thousands	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 USD ($)	Dec. 31, 2011 CNY (¥)	Dec. 31, 2010 CNY (¥)
Accounts and Other Receivables [Line Items]
Accounts receivable	$ 47,144	¥ 293,710		¥ 149,745
Allowance for doubtful debts	(55)	(341)	$ (341)	(2,121)	¥ (2,453)
Accounts receivable (net of allowance for doubtful accounts of RMB2,121 and RMB341 (US$55) as of December 31, 2011 and 2012, respectively)	$ 47,089	¥ 293,369		¥ 147,624

Analysis of Allowance for Doubtful Accounts (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)	Dec. 31, 2010 CNY (¥)
Accounts and Other Receivables [Line Items]
Balance at beginning of the year	$ 341	¥ 2,121	¥ 2,453
Provision	86	538	183	¥ 1,097
Write-off of accounts receivable	(372)	(2,318)	(515)
Balance at the end of the year	$ 55	¥ 341	¥ 2,121	¥ 2,453

Short Term Investments (Detail) - Held-to-maturity securities - Fixed rate time deposits ¥ in Thousands, $ in Thousands	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)
Investment [Line Items]
Carrying Value		¥ 222,701	¥ 894,540
Unrealized gains/(losses)
Estimated Fair Value	$ 35,746	¥ 222,701	¥ 894,540

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents investments in debt securities which are categorized as held-to-maturity and that have scheduled maturities more than one year from the balance sheet date or operating cycle, if longer; such investments are normally measured at amortized cost (carrying value) unless circumstances indicate that the value to be recovered from the investment is less than its carried amount. The held-to-maturity category is for those securities that the Company has the positive intent and ability to hold until maturity.

Short-Term Investments - Additional Information (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)	Dec. 31, 2010 CNY (¥)
Investment [Line Items]
Investments, interest income	$ 2,616	¥ 16,301	¥ 14,939	¥ 580
Short-term investments
Investment [Line Items]
Investments, interest income	$ 2,040	¥ 12,708	¥ 12,961

Prepaid Expenses and Other Current Assets (Detail) ¥ in Thousands, $ in Thousands	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)
Prepaid And Other Current Assets [Line Items]
Prepaid expenses for bandwidth, rented computer rooms and cabinets	$ 3,196	¥ 19,913	¥ 15,478
Staff field advances	406	2,530	993
Interest receivable	1,123	6,998	10,295
Loans to shareholder of iJoy (Note 4)	2,068	12,885
Receivables for the disposal of certain construction-in-progress	3,257	20,290
Tax recoverable	1,352	8,422	2,140
Office deposits	1,330	8,288	4,612
Other receivables	2,638	16,430	14,057
Prepaid expenses and other current assets	$ 15,370	¥ 95,756	¥ 47,575

Property and Equipment Including Those Held Under Capital Leases (Detail) ¥ in Thousands, $ in Thousands	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)
Property, Plant, and Equipment Disclosure [Line Items]
Property and Equipment, gross	$ 151,024	¥ 940,892	¥ 568,949
Less: Accumulated depreciation	(47,595)	(296,521)	(201,526)
Property Plant And Equipment Net Excluding Construction In Progress, Total	103,429	644,371	367,423
Construction-in-progress	28,625	178,336	86,460
Property and Equipment, net	132,054	822,707	453,883
Buildings
Property, Plant, and Equipment Disclosure [Line Items]
Property and Equipment, gross	5,142	32,035	11,089
Leasehold improvements
Property, Plant, and Equipment Disclosure [Line Items]
Property and Equipment, gross	27,370	170,519	55,855
Computer and network equipment
Property, Plant, and Equipment Disclosure [Line Items]
Property and Equipment, gross	106,747	665,040	431,311
Optical fibers
Property, Plant, and Equipment Disclosure [Line Items]
Property and Equipment, gross	10,385	64,700	63,094
Office equipment
Property, Plant, and Equipment Disclosure [Line Items]
Property and Equipment, gross	1,142	7,113	7,257
Motor vehicles
Property, Plant, and Equipment Disclosure [Line Items]
Property and Equipment, gross	$ 238	¥ 1,485	¥ 343

Property and Equipment Net - Additional Information (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)	Dec. 31, 2010 CNY (¥)
Property, Plant, and Equipment Disclosure [Line Items]
Depreciation expense	$ 14,893	¥ 92,786	¥ 58,873	¥ 21,854
Property plant and equipment
Property, Plant, and Equipment Disclosure [Line Items]
Depreciation expense	14,893	92,786	58,873	19,673
Assets held under capital leases
Property, Plant, and Equipment Disclosure [Line Items]
Depreciation expense	$ 2,558	¥ 15,934	¥ 12,094	¥ 3,413

Depreciation Expense (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)	Dec. 31, 2010 CNY (¥)
Property, Plant, and Equipment Disclosure [Line Items]
Depreciation expense	$ 14,893	¥ 92,786	¥ 58,873	¥ 21,854
Cost of revenue
Property, Plant, and Equipment Disclosure [Line Items]
Depreciation expense	11,217	69,883	41,271	11,863
Sales and marketing expenses
Property, Plant, and Equipment Disclosure [Line Items]
Depreciation expense	130	814	966	777
General and administrative expense
Property, Plant, and Equipment Disclosure [Line Items]
Depreciation expense	432	2,691	2,034	2,071
Research and development expense
Property, Plant, and Equipment Disclosure [Line Items]
Depreciation expense	3,114	19,398	14,602	4,962
Property plant and equipment
Property, Plant, and Equipment Disclosure [Line Items]
Depreciation expense	$ 14,893	¥ 92,786	¥ 58,873	¥ 19,673

Carrying Amounts of Property and Equipment Held Under Capital Leases (Detail) ¥ in Thousands, $ in Thousands	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)
Capital Leased Assets [Line Items]
Property and Equipment Held Under Capital Leases, gross	$ 24,393	¥ 151,972	¥ 143,672
Less: accumulated depreciation	(5,315)	(33,115)	(15,790)
Property and Equipment Held Under Capital Leases, net	19,078	118,857	127,882
Computer and network equipment
Capital Leased Assets [Line Items]
Property and Equipment Held Under Capital Leases, gross	14,008	87,272	80,578
Optical fibers
Capital Leased Assets [Line Items]
Property and Equipment Held Under Capital Leases, gross	$ 10,385	¥ 64,700	¥ 63,094

Carrying Amounts of Computer and Network Equipment Pledged to Secure Banking Borrowings (Detail) ¥ in Thousands, $ in Thousands	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)
Buildings
Property, Plant, and Equipment Disclosure [Line Items]
Assets pledged as collateral	$ 3,111	¥ 19,381
Computer and network equipment
Property, Plant, and Equipment Disclosure [Line Items]
Assets pledged as collateral	$ 7,435	¥ 46,320	¥ 20,000

Summary of Intangible Assets (Detail)
¥ in Thousands, $ in Thousands

12 Months Ended

Dec. 31, 2012

USD ($)

Dec. 31, 2012

CNY (¥)

Dec. 31, 2011

CNY (¥)

Dec. 31, 2010

CNY (¥)

¥ 159,439

¥ 157,086

179,847

32,460

Disposals

(3)

$ (5,678)

(35,377)

(30,104)

¥ (11,658)

48,781

303,909

159,439

157,086

Purchased software

3,217

3,916

12,217

1,020

Disposals

(3)

(1,907)

(1,716)

2,173

13,527

3,217

3,916

Radio Spectrum License

121,425

(6,119)

18,508

115,306

Network Use Right

20,000

(167)

3,183

19,833

Contract Backlog

^[1]

902

1,905

^[1]

1,850

910

^[1]

(1,223)

(1,913)

^[1]

245

1,529

902

1,905

Customer Relationships

^[1]

35,083

41,403

^[1]

13,500

8,410

^[1]

(10,948)

(14,730)

^[1]

6,041

37,635

35,083

41,403

Licenses

^[1]

1,308

1,298

^[1]

100

^[1]

(95)

(90)

^[1]

195

1,213

1,308

1,298

Supplier Relationships

^[1]

104,904

93,519

^[1]

1,955

22,020

^[1]

(13,305)

(10,635)

^[1]

15,016

93,554

104,904

93,519

Trade Names

^[1]

14,025

15,045

^[1]

(1,020)

^[1]

2,087

13,005

¥ 14,025

¥ 15,045

Platform Software

^[1]

8,900

^[1]

(593)

^[1]

$ 1,333

¥ 8,307

[1]	Acquired in the acquisition of SH Guotong, Managed Network Entities, Gehua and Fastweb (Note 4)

Intangible Assets Net - Additional Information (Detail) ¥ in Thousands, $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2012 HKD ($)	Dec. 31, 2011 CNY (¥)	Dec. 31, 2010 CNY (¥)
Intangible Assets [Line Items]
Intangible assets, amortization expenses	$ 5,678	¥ 35,377		¥ 30,104	¥ 11,658
Radio Spectrum License
Intangible Assets [Line Items]
License fee \| $			$ 150,000
Estimated useful life of intangible assets	15 years	15 years	15 years
Intangible assets, amortization expenses		¥ 6,119
Network Use Right
Intangible Assets [Line Items]
Estimated useful life of intangible assets	20 years	20 years	20 years
Upfront fee		¥ 20,000
Intangible assets, amortization expenses		¥ 167
Minimum
Intangible Assets [Line Items]
Estimated useful life of intangible assets	5 years	5 years	5 years
Maximum
Intangible Assets [Line Items]
Estimated useful life of intangible assets	20 years	20 years	20 years
Customer Relationships \| Minimum
Intangible Assets [Line Items]
Estimated useful life of intangible assets	4 years	4 years	4 years
Customer Relationships \| Maximum
Intangible Assets [Line Items]
Estimated useful life of intangible assets	8 years	8 years	8 years

Annual Estimated Amortization Expenses of Intangible Assets (Detail) ¥ in Thousands	Dec. 31, 2012 CNY (¥)
Finite Lived Intangible Assets Future Amortization Expense [Line Items]
2013	¥ 40,386
2014	35,240
2015	33,793
2016	32,430
2017	28,653
Purchased software
Finite Lived Intangible Assets Future Amortization Expense [Line Items]
2013	4,341
2014	3,626
2015	3,503
2016	3,209
2017	2,561
Radio Spectrum License
Finite Lived Intangible Assets Future Amortization Expense [Line Items]
2013	8,105
2014	8,105
2015	8,105
2016	8,105
2017	8,105
Network Use Right
Finite Lived Intangible Assets Future Amortization Expense [Line Items]
2013	1,000
2014	1,000
2015	1,000
2016	1,000
2017	1,000
Contract Backlog
Finite Lived Intangible Assets Future Amortization Expense [Line Items]
2013	1,385
Customer Relationships
Finite Lived Intangible Assets Future Amortization Expense [Line Items]
2013	9,568
2014	7,825
2015	6,501
2016	5,432
2017	2,891
Licenses
Finite Lived Intangible Assets Future Amortization Expense [Line Items]
2013	95
2014	95
2015	95
2016	95
2017	95
Supplier Relationships
Finite Lived Intangible Assets Future Amortization Expense [Line Items]
2013	13,093
2014	11,790
2015	11,790
2016	11,790
2017	11,790
Trade Names
Finite Lived Intangible Assets Future Amortization Expense [Line Items]
2013	1,020
2014	1,020
2015	1,020
2016	1,020
2017	1,020
Platform Software
Finite Lived Intangible Assets Future Amortization Expense [Line Items]
2013	1,779
2014	1,779
2015	1,779
2016	1,779
2017	¥ 1,191

Goodwill (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
Goodwill (Detail) ¥ in Thousands, $ in Thousands	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)
Goodwill [Line Items]
Acquisition of goodwill	$ 47,622	¥ 296,688	¥ 217,436
SH Guotong
Goodwill [Line Items]
Acquisition of goodwill	2,007	12,507	12,507
Managed Network Entities
Goodwill [Line Items]
Acquisition of goodwill	25,307	157,664	157,664
Guangzhou Gehua Network Technology and Development Co., ("Gehua")
Goodwill [Line Items]
Acquisition of goodwill	7,587	47,265	¥ 47,265
Fastweb International Holdings
Goodwill [Line Items]
Acquisition of goodwill	$ 12,721	¥ 79,252

Long-Term Investments - Additional Information (Detail) - CNY (¥) ¥ in Thousands	1 Months Ended	12 Months Ended
	Sep. 30, 2011	Dec. 31, 2012
Yizhuang Venture Investment Fund
Investment [Line Items]
Investment in an equity investee, percentage		27.694%
Investment in an equity investee		¥ 50,500
Yizhuang Venture Investment Fund \| Upon the written notice of Yizhuang Fund
Investment [Line Items]
Investment in an equity investee		¥ 50,500
Telehouse Beijing Company Limited
Investment [Line Items]
Investment in an equity investee, percentage	10.00%
Investment in an equity investee	¥ 8,200
Long-term Investment, equity interest acquisition date	Sep. 30, 2011

Investment in Equity Investee (Detail) - 12 months ended Dec. 31, 2012 ¥ in Thousands, $ in Thousands	USD ($)	CNY (¥)	CNY (¥)
Schedule of Equity Method Investments [Line Items]
Share equity income (loss)	$ (177)	¥ (1,101)
Share equity income (loss)	(177)	(1,101)
Yizhuang Venture Investment Fund
Schedule of Equity Method Investments [Line Items]
Cost investment increase		50,500
Share equity income (loss)		(1,101)
Cost investment			¥ 50,500
Share equity income (loss)		¥ (1,101)
Investment in equity investee	$ 7,929		¥ 49,399

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33749-111570

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.12)
-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 9
-Article 5

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 18
-Paragraph 19
-Subparagraph c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 18
-Paragraph 6
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 11
-Article 7

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 28
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Summary of Bank Borrowing (Detail) ¥ in Thousands, $ in Thousands	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)
Line of Credit Facility [Line Items]
Short-term borrowings	$ 28,404	¥ 176,961	¥ 100,000
Long-term borrowings	26,946	167,879
Debt, Current, Total	55,350	344,840	100,000
Long-term borrowings	10,112	63,000
Total bank borrowings	$ 65,462	¥ 407,840	¥ 100,000

Bank Borrowings - Additional Information (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)
Schedule Of Short And Long Term Debt [Line Items]
Short-term bank borrowings, weighted Average Interest rate	7.66%	7.66%	6.76%
Long-term bank borrowings, weighted Average Interest rate	8.35%	8.35%
Current and non-current portions of long-term bank borrowings, maturity start date	May 25, 2013
Current and non-current portions of long-term bank borrowings, maturity end date	May 25, 2015
Unused loan facilities	$ 39,763	¥ 247,726	¥ 10,000
Minimum
Schedule Of Short And Long Term Debt [Line Items]
Short-term bank borrowings, term	2 months
Maximum
Schedule Of Short And Long Term Debt [Line Items]
Short-term bank borrowings, term	1 year

Current and Non-current Portions of Long Term Bank Borrowings (Detail) - Dec. 31, 2012 ¥ in Thousands, $ in Thousands	USD ($)	CNY (¥)
Debt Instrument [Line Items]
2013	$ 26,946	¥ 167,879
2014	2,086	13,000
2015	8,026	50,000
Long-term borrowings	$ 37,058	¥ 230,879

Secured or Guaranteed Bank Borrowings (Detail) ¥ in Thousands, $ in Thousands	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)
Debt Instrument [Line Items]
Bank borrowings	$ 28,404	¥ 176,961	¥ 100,000
Long-term borrowings	$ 37,058	230,879
Restricted Cash \| Long-Term Loan One
Debt Instrument [Line Items]
Long-term borrowings		63,000
Restricted Cash \| Long-Term Loan Two
Debt Instrument [Line Items]
Long-term borrowings		167,879
Jointly guaranteed by third party, company's computer and network equipment, Director and CEO and Director and COO \| Short Term Loan One
Debt Instrument [Line Items]
Bank borrowings			30,000
Jointly guaranteed by third party, company's computer and network equipment, Director and CEO and Director and COO \| Short Term Loan Six
Debt Instrument [Line Items]
Bank borrowings		30,000
Jointly guaranteed by third party, company's computer and network equipment, Director and CEO and Director and COO \| Short Term Loan Seven
Debt Instrument [Line Items]
Bank borrowings		30,000
Mr. Chen Sheng and Mr. Zhang Jun \| Short Term Loan Three
Debt Instrument [Line Items]
Bank borrowings			30,000
Mr. Chen Sheng and Mr. Zhang Jun \| Short Term Loan Eight
Debt Instrument [Line Items]
Bank borrowings		90,000
Third Party Guarantor \| Short Term Loan Two
Debt Instrument [Line Items]
Bank borrowings			30,000
Jointly guaranteed by third party and company's computer and network equipment \| Short Term Loan Five
Debt Instrument [Line Items]
Bank borrowings		20,000
Jointly guaranteed by Director and CEO, Director and COO and restricted cash \| Short Term Loan Nine
Debt Instrument [Line Items]
Bank borrowings		¥ 6,961
Unsecured Loans \| Short Term Loan Four
Debt Instrument [Line Items]
Bank borrowings			¥ 10,000

Secured or Guaranteed Bank Borrowings (Parenthetical) (Detail) ¥ in Thousands, $ in Thousands	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)
Computer and network equipment
Debt Instrument [Line Items]
Computer and network equipment, net book value	$ 7,435	¥ 46,320	¥ 20,000
Short Term Loan One \| Mr. Chen Sheng and Mr. Zhang Jun
Debt Instrument [Line Items]
Guarantee provided to the third party guarantor, maximum			12,000
Short Term Loan One \| Computer and network equipment
Debt Instrument [Line Items]
Computer and network equipment, net book value			¥ 20,000
Short Term Loan Five \| Mr. Chen Sheng and Mr. Zhang Jun
Debt Instrument [Line Items]
Guarantee provided to the third party guarantor, maximum		20,000
Short Term Loan Five \| Computer and network equipment
Debt Instrument [Line Items]
Computer and network equipment, net book value		25,720
Short Term Loan Six \| Mr. Chen Sheng and Mr. Zhang Jun
Debt Instrument [Line Items]
Guarantee provided to the third party guarantor, maximum		30,000
Short Term Loan Six \| Computer and network equipment
Debt Instrument [Line Items]
Guarantee provided to the third party guarantor, maximum		20,600
Short Term Loan Seven \| Mr. Chen Sheng and Mr. Zhang Jun
Debt Instrument [Line Items]
Guarantee provided to the third party guarantor, maximum		30,000
Short Term Loan Seven \| Computer and network equipment
Debt Instrument [Line Items]
Computer and network equipment, net book value		19,381
Short Term Loan Nine \| Restricted Cash
Debt Instrument [Line Items]
Restricted cash		766
Long-Term Loan One \| Restricted Cash
Debt Instrument [Line Items]
Restricted cash		100,000
Long-Term Loan Two \| Restricted Cash
Debt Instrument [Line Items]
Restricted cash		¥ 190,000

Components of Accrued Expenses and Other Payables (Detail) ¥ in Thousands, $ in Thousands	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)
Accrued Expenses and Other Current Liabilities [Line Items]
Payroll and welfare payable	$ 3,756	¥ 23,395	¥ 20,486
Business and other taxes payable	8,406	52,368	58,640
Payables for office supplies and utilities	390	2,424	2,248
Payables for the purchase of property and equipment	8,131	50,648	33,273
Accrued service fees	1,966	12,248	5,316
Others	1,000	6,227	3,937
Accrued Liabilities and Other Liabilities	26,890	167,498	124,326
Purchased software
Accrued Expenses and Other Current Liabilities [Line Items]
Payable for purchase of intangible assets	50	307	¥ 426
Network Use Right
Accrued Expenses and Other Current Liabilities [Line Items]
Payable for purchase of intangible assets	$ 3,191	¥ 19,881

Future Minimum Lease Payments Under Non Cancellable Capital Lease Arrangements (Detail) - Dec. 31, 2012 ¥ in Thousands, $ in Thousands	USD ($)	CNY (¥)
Schedule of Capital Lease Obligations [Line Items]
2013	$ 6,766	¥ 42,151
2014	4,954	30,862
2015	4,093	25,497
2016	114	712
2017 and thereafter	143	890
Total minimum lease payments	16,070	100,112
Less: amount representing interest	(1,773)	(11,041)
Present value of remaining minimum lease payments	$ 14,297	¥ 89,071

Capital Lease Obligations - Additional Information (Detail)	Dec. 31, 2012	Dec. 31, 2011
Capital Leases
Schedule of Capital Lease Obligations [Line Items]
Weighted average interest rate	7.93%	7.56%

Deferred Government Grants - Additional Information (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)
Deferred government grant
Component of Other Income, Nonoperating [Line Items]
Government grants received	$ 2,544	¥ 15,850	¥ 1,000

Movements of Deferred Government Grants (Detail) - Deferred government grant ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at beginning of the year	$ 934	¥ 5,819	¥ 5,400
Additions	2,544	15,850	1,000
Recognized in income as a reduction of depreciation expense	(462)	(2,876)	(581)
Balance at end of the year	$ 3,016	¥ 18,793	¥ 5,819

Preferred Shares - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended
	Feb. 28, 2011	Jan. 31, 2011	Dec. 31, 2012	Oct. 31, 2010
Class of Stock [Line Items]
Convertible preferred shares, issuance price	$ 1.33	$ 1.24
Beijing aBitCool Network Technology Co., Ltd. ("21Vianet Technology") \| Internet Data Center Services
Class of Stock [Line Items]
Percentage of outstanding number of preferred aBitCool				85.00%
Beijing aBitCool Network Technology Co., Ltd. ("21Vianet Technology") \| Non Internet Data Center Services
Class of Stock [Line Items]
Percentage of outstanding number of preferred aBitCool				15.00%
Series A preferred shares
Class of Stock [Line Items]
Convertible preferred shares, issued				41,408,340
Preferred Shares holders, percentage of stated issuance price entitled to receive				100.00%
Preferred Shares, conversion ratio into an ordinary share			1
Series A preferred shares \| Minimum
Class of Stock [Line Items]
Percentage of outstanding Preferred Shares holders vote required for conversion into ordinary shares			51.00%
Series B preferred shares
Class of Stock [Line Items]
Convertible preferred shares, issued				69,557,840
Preferred Shares holders, percentage of stated issuance price entitled to receive				100.00%
Preferred Shares, conversion ratio into an ordinary share			1
Series B preferred shares \| Minimum
Class of Stock [Line Items]
Percentage of outstanding Preferred Shares holders vote required for conversion into ordinary shares			51.00%
Series B preferred shares \| After December 1, 2012
Class of Stock [Line Items]
Series B Preferred Shares, redemption price percentage of stated issuance price			120.00%
Series A1 Preferred Stock
Class of Stock [Line Items]
Convertible preferred shares, issued				30,411,130
Convertible preferred shares, issuance price				$ 0.45
Effective conversion price				$ 1.28
Series A2 Preferred Stock
Class of Stock [Line Items]
Convertible preferred shares, issued				5,944,580
Convertible preferred shares, issuance price				$ 0.77
Effective conversion price				$ 1.31
Series A3 Preferred Stock
Class of Stock [Line Items]
Convertible preferred shares, issued				5,052,630
Convertible preferred shares, issuance price				$ 0.51
Effective conversion price				$ 1.28
Series B1 Preferred Stock
Class of Stock [Line Items]
Convertible preferred shares, issued				10,947,370
Convertible preferred shares, issuance price				$ 0.51
Effective conversion price				1.34
Preferred stock, redemption price per share				$ 0.61
Series B2 Preferred Stock
Class of Stock [Line Items]
Convertible preferred shares, issued				58,610,470
Convertible preferred shares, issuance price				$ 0.63
Effective conversion price				1.37
Preferred stock, redemption price per share				$ 0.76
Series C1 Preferred Stock
Class of Stock [Line Items]
Convertible preferred shares, issued	5,313,820	31,882,930
Convertible preferred shares, total gross cash proceeds	$ 5,000	$ 30,000
Effective conversion price	$ 0.94	$ 0.94
Beneficial conversion features recorded	$ 2,051	$ 9,662

Treasury Stock - Additional Information (Detail) ¥ in Thousands, $ in Thousands	1 Months Ended			12 Months Ended
	Dec. 31, 2012 shares	Jul. 31, 2012 shares	Apr. 30, 2012 shares	Dec. 31, 2011 USD ($) shares	Dec. 31, 2011 CNY (¥) shares
Schedule of Capitalization, Equity [Line Items]
Share Repurchase Plan, shares repurchased		2,686,965
Share Repurchase Plan, consideration \| ¥					¥ 190,022
American Depository Shares
Schedule of Capitalization, Equity [Line Items]
Share Repurchase Plan, shares repurchased				3,022,532	3,022,532
Share Repurchase Plan, consideration \| $				$ 29,918
American Depository Shares \| Managed Network Entities
Schedule of Capitalization, Equity [Line Items]
Shares issued	95,000			350,000	350,000
Equity interest purchased, percentage	51.00%			49.00%	49.00%
American Depository Shares \| Managed Network Entities \| American Depository Shares Issue One
Schedule of Capitalization, Equity [Line Items]
Shares issued			998,607
Equity interest purchased, percentage			51.00%
American Depository Shares \| Managed Network Entities \| American Depository Shares Issue Two
Schedule of Capitalization, Equity [Line Items]
Shares issued			932,829
Equity interest purchased, percentage			49.00%
American Depository Shares \| Guangzhou Gehua Network Technology and Development Co., ("Gehua")
Schedule of Capitalization, Equity [Line Items]
Shares issued			316,803
Equity interest purchased, percentage			100.00%

Statutory Reserves - Additional Information (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)
Statutory Accounting Practices [Line Items]
Statutory Reserve	$ 4,153	¥ 25,871	¥ 15,837
PRC
Statutory Accounting Practices [Line Items]
Statutory Reserve	$ 4,153	¥ 25,871	¥ 15,837
PRC \| Minimum
Statutory Accounting Practices [Line Items]
Minimum required Percentage of annual after-tax profit to the general statutory reserve	10.00%	10.00%
PRC \| Maximum
Statutory Accounting Practices [Line Items]
Maximum requirement of each of the Entity's PRC Subsidiaries' after-tax profits to be allocated to a general reserve fund as a percentage of each Subsidiaries' registered capital	50.00%

A segregation of retained earnings which is unavailable for dividend distribution. Includes also retained earnings appropriated for loss contingencies.

Mainland China Employee Contribution Plan - Additional Information (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)	Dec. 31, 2010 CNY (¥)
Defined Benefit Plan Disclosure [Line Items]
Total expense for defined contribution plan	$ 4,657	¥ 29,015	¥ 17,499	¥ 9,743

Share Based Compensation - Additional Information (Detail) $ / shares in Units, ¥ in Thousands, $ in Thousands	1 Months Ended			12 Months Ended
	Jul. 31, 2012 shares	Jan. 31, 2011	Jul. 31, 2010 $ / shares shares	Dec. 31, 2012 USD ($) $ / shares shares	Dec. 31, 2012 CNY (¥) shares	Dec. 31, 2011 USD ($) $ / shares shares	Dec. 31, 2011 CNY (¥) shares	Dec. 31, 2010 USD ($) $ / shares shares	Dec. 31, 2010 CNY (¥) shares	Dec. 31, 2012 CNY (¥) shares	Jul. 06, 2012 shares	Dec. 31, 2011 CNY (¥) shares	Mar. 31, 2011 $ / shares	Jan. 14, 2011 shares	Jul. 16, 2010 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, option contractual term				6 years 10 months 24 days	6 years 10 months 24 days	7 years 2 months 12 days	7 years 2 months 12 days
Option granted			24,078,670	3,829,830	3,829,830
Weighted average exercise price of options granted \| $ / shares			$ 0.15	$ 0.54
Share based compensation, option outstanding				17,898,396		18,180,898				17,898,396		18,180,898
Share based compensation, aggregate intrinsic value \| $				$ 23,571		$ 23,425
Aggregate intrinsic value of options exercise \| $				4,487		$ 14,061
Share based compensation, shares issued par value per share \| $ / shares													$ 0.00001
Share based compensation expense				$ 10,856	¥ 67,632		¥ 41,959		¥ 277,881
Shares repurchased from Sunrise	2,686,965
Chief Executive Officer and Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, shares issued for service contribution								24,826,090	24,826,090
Share based compensation, shares issued par value per share \| $ / shares								$ 0.00001
Share based compensation expense								$ 31,217	¥ 206,037
Share based compensation expense per ordinary share \| $ / shares								$ 1.234
Performance Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option granted				2,524,932	2,524,932	1,964,424	1,964,424
2010 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, option contractual term		10 years
Share based compensation, option outstanding				17,898,396		18,180,898				17,898,396		18,180,898
Share based compensation, shares available for grant				3,258,737						3,258,737
Share based compensation, aggregate intrinsic value				$ 23,571						¥ 146,850		¥ 147,435
Share based compensation, fair value of option outstanding at grant date				$ 19,186						119,532
Share based compensation, weighted average grant-date fair value of option \| $ / shares				$ 1.49		$ 1.54		$ 0.15
Share based compensation, fair value of shares vested during the period \| $				$ 9,097		$ 9,804		$ 26,842
Unrecognized share-based compensation cost, net of estimated forfeitures \| ¥										¥ 38,086
Unrecognized compensation costs, weighted-average recognition period				6 months	6 months
2010 Plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, maximum aggregate number of ordinary shares to be issued											39,272,595			36,585,630	38,307,310
Share based compensation, option vesting period		4 years
2010 Plan \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, option vesting period		3 years
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, RSUs granted				812,187	812,187
Unrecognized compensation costs, weighted-average recognition period				3 years 3 months 18 days	3 years 3 months 18 days
Aggregate fair value, unvested \| $				$ 1,098
Unrecognized share-based compensation cost \| $				$ 5,713
Restricted Stock Units (RSUs) \| Performance Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, RSUs granted				432,910	432,910

Summary of Employee Share Option Activity Under Twenty Ten Plan (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Jul. 31, 2010	Dec. 31, 2012	Dec. 31, 2011
Number of options
Outstanding, beginning balance		18,180,898
Granted	24,078,670	3,829,830
Exercised		(3,128,472)
Forfeited		(983,860)
Outstanding, ending balance		17,898,396	18,180,898
Vested and expected to vest at December 31, 2012		17,898,396
Exercisable as of December 31, 2012		11,715,639
Weighted average exercise price
Outstanding, beginning balance		$ 0.24
Granted	$ 0.15	0.54
Exercised		0.17
Forfeited		0.89
Outstanding, ending balance		0.28	$ 0.24
Vested and expected to vest at December 31, 2012		0.28
Exercisable as of December 31, 2012		$ 0.19
Weighted average remaining contractual term
Outstanding, December 31, 2012		6 years 10 months 24 days	7 years 2 months 12 days
Vested and expected to vest at December 31, 2012		6 years 10 months 24 days
Exercisable as of December 31, 2012		6 years 3 months 18 days
Aggregate intrinsic value
Outstanding, December 31, 2012		$ 23,571	$ 23,425
Vested and expected to vest at December 31, 2012		23,571
Exercisable as of December 31, 2012		$ 16,485

Assumptions Used to Calculate Grant Date Estimated Fair Value of Share Options Using Black Scholes Option Model or Binomial Lattice Model (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share based Compensation Arrangement Assumptions Used to Estimate Fair Values of Share Options Granted [Line Items]
Risk-free interest rates, Minimum	2.06%		1.41%
Risk-free interest rates, Maximum	3.68%		2.35%
Sub optimal early exercise factor	2.2
Expected volatility, Minimum	57.01%		40.14%
Expected volatility, Maximum	68.03%		67.24%
Expected dividend yield	0.00%		0.00%
Minimum
Share based Compensation Arrangement Assumptions Used to Estimate Fair Values of Share Options Granted [Line Items]
Expected life (years)			8 months 16 days
Fair value of share option	$ 1.34		$ 0.83
Maximum
Share based Compensation Arrangement Assumptions Used to Estimate Fair Values of Share Options Granted [Line Items]
Expected life (years)			4 years 15 days
Fair value of share option	$ 1.68
Before September 30,2011
Share based Compensation Arrangement Assumptions Used to Estimate Fair Values of Share Options Granted [Line Items]
Risk-free interest rates, Minimum		1.03%
Risk-free interest rates, Maximum		3.36%
Expected volatility, Minimum		24.25%
Expected volatility, Maximum		76.00%
Expected dividend yield		0.00%
Before September 30,2011 \| Minimum
Share based Compensation Arrangement Assumptions Used to Estimate Fair Values of Share Options Granted [Line Items]
Expected life (years)		29 days
Fair value of share option		$ 1.20
Before September 30,2011 \| Maximum
Share based Compensation Arrangement Assumptions Used to Estimate Fair Values of Share Options Granted [Line Items]
Expected life (years)		7 years 9 months
Fair value of share option		$ 2.06
After September 30,2011
Share based Compensation Arrangement Assumptions Used to Estimate Fair Values of Share Options Granted [Line Items]
Risk-free interest rates, Minimum		1.03%
Risk-free interest rates, Maximum		3.36%
Sub optimal early exercise factor		2.2
Expected volatility, Minimum		69.17%
Expected dividend yield		0.00%
After September 30,2011 \| Minimum
Share based Compensation Arrangement Assumptions Used to Estimate Fair Values of Share Options Granted [Line Items]
Fair value of share option		$ 1.02
After September 30,2011 \| Maximum
Share based Compensation Arrangement Assumptions Used to Estimate Fair Values of Share Options Granted [Line Items]
Fair value of share option		$ 1.03

Restricted Stock Units Activity (Detail) - Restricted Stock Units (RSUs) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($) $ / shares shares
Number of RSUs
Granted \| shares	812,187
Vested \| shares	(107,582)
Forfeited \| shares	(18,762)
Unvested, ending balance \| shares	685,843
Weighted-average grant date fair value
Granted \| $ / shares	$ 10.27
Vested \| $ / shares	11.01
Forfeited \| $ / shares	11.31
Unvested, ending balance \| $ / shares	$ 10.12
Weighted-average remaining contractual terms (Years)
Unvested, December 31, 2012	9 years 4 months 24 days
Aggregated intrinsic value
Unvested, December 31, 2012 \| $	$ 1,098

Total Compensation Expense Recognized Relating to Options Granted to Employees (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)	Dec. 31, 2010 CNY (¥)
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share based compensation expense	$ 10,856	¥ 67,632	¥ 41,959	¥ 71,844
Cost of revenues
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share based compensation expense	725	4,517	2,157	4,645
Selling and Marketing Expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share based compensation expense	1,687	10,508	5,763	11,884
General and administrative expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share based compensation expense	7,664	47,749	31,420	48,899
Research and development expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share based compensation expense	$ 780	¥ 4,858	¥ 2,619	¥ 6,416

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

Taxation - Additional Information (Detail) ¥ in Thousands, $ in Thousands	1 Months Ended				12 Months Ended				36 Months Ended
	Jul. 31, 2012	Apr. 30, 2011	Jun. 30, 2009	Apr. 30, 2009	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)	Dec. 31, 2010 CNY (¥)	Dec. 31, 2012 USD ($)	Dec. 31, 2008	Dec. 31, 2012 CNY (¥)	Jan. 01, 2006
Income Taxes [Line Items]
Income tax rate on PRC tax resident enterprises					25.00%	25.00%
Unrecognized tax benefits					$ 1,981		¥ 26,801		$ 1,981		¥ 12,340
Guangzhou Gehua Network Technology and Development Co., ("Gehua")
Income Taxes [Line Items]
Preferential tax rate	15.00%
Preferential tax rate, additional term	3 years
Preferential tax rate, starting period	2012
Preferential tax rate, ending period	2014
Guangzhou Gehua Network Technology and Development Co., ("Gehua") \| If HNTE Technical and Administrative Requirements has been Satisfied in the Initial Preferential Tax Rate Period
Income Taxes [Line Items]
Preferential tax rate, additional term	3 years
Beijing 21ViaNet Broadband Data Center Co., Ltd ("21Vianet Beijing")
Income Taxes [Line Items]
Tax holiday period												6 years
Tax holiday exemption period										3 years
Tax holiday, exemption rate									50.00%	100.00%
Tax holiday reduction in EIT rate period				3 years
Preferential tax rate							12.50%	12.50%	15.00%	15.00%
Expiration date of HNTE certificate					Dec. 31, 2013	Dec. 31, 2013
Beijing 21ViaNet Broadband Data Center Co., Ltd ("21Vianet Beijing") \| If HNTE Technical and Administrative Requirements has been Satisfied in the Initial Preferential Tax Rate Period
Income Taxes [Line Items]
Preferential tax rate, additional term									3 years
21Vianet Xi'an BPO Service Co., Ltd. ("Xi'an Sub")
Income Taxes [Line Items]
Preferential tax rate		15.00%
Beijing Fastweb Technology Company Limited
Income Taxes [Line Items]
Preferential tax rate			15.00%
Preferential tax rate, additional term			3 years
Preferential tax rate, starting period			2009
Preferential tax rate, ending period			2011
Beijing Fastweb Technology Company Limited \| If HNTE Technical and Administrative Requirements has been Satisfied in the Initial Preferential Tax Rate Period
Income Taxes [Line Items]
Preferential tax rate, additional term			3 years
PRC
Income Taxes [Line Items]
Unified enterprise income tax rate					25.00%	25.00%	25.00%	25.00%
Net tax operating losses from PRC subsidiaries and its consolidated VIE					$ 4,272		¥ 19,987		$ 4,272		26,616
Interest expense					103	¥ 641	857	¥ 181
Accumulated interest expense					$ 328		¥ 1,398		$ 328		¥ 2,038
PRC \| Minimum
Income Taxes [Line Items]
Net tax operating losses expiration year					2013	2013
PRC \| Maximum
Income Taxes [Line Items]
Net tax operating losses expiration year					2018	2018
Hong Kong \| 21Vianet Group Limited ("21Vianet HK")
Income Taxes [Line Items]
Income tax rate					16.50%	16.50%	16.50%	16.50%

Profit or Loss From Continuing Operations Before Income Taxes (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)	Dec. 31, 2010 CNY (¥)
Schedule of Income Before Income Tax [Line Items]
(Loss) profit from continuing operations before income taxes	$ 15,056	¥ 93,815	¥ 59,616	¥ (233,127)
Non-PRC
Schedule of Income Before Income Tax [Line Items]
(Loss) profit from continuing operations before income taxes	(11,900)	(74,140)	(4,912)	(282,527)
PRC
Schedule of Income Before Income Tax [Line Items]
(Loss) profit from continuing operations before income taxes	$ 26,956	¥ 167,955	¥ 64,528	¥ 49,400

Income Tax Benefit or Expense (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)	Dec. 31, 2010 CNY (¥)
Components Of Income Tax Expense Benefit [Line Items]
Current	$ (7,300)	¥ (45,481)	¥ (32,169)	¥ (10,581)
Deferred	1,496	9,322	18,492	8,993
Income tax benefit	$ (5,804)	¥ (36,159)	¥ (13,677)	¥ (1,588)

The component of income tax expense for the period representing amounts of income taxes paid or payable (or refundable) for the period for all income tax obligations as determined by applying the provisions of relevant enacted tax laws to relevant amounts of taxable Income or Loss from continuing operations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Current Tax Expense (or Benefit)
-URI http://asc.fasb.org/extlink&oid=6509736

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 6.I.7)
-URI http://asc.fasb.org/extlink&oid=6889476&loc=d3e330036-122817

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 45
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Article 4

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 6
-Section I
-Subsection 7

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 289
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reconciliation Tax Computed Applying Statutory Income Tax Rate (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)	Dec. 31, 2010 CNY (¥)
Income Tax Rate Reconciliation [Line Items]
(Loss) profit from continuing operations before income taxes	$ 15,056	¥ 93,815	¥ 59,616	¥ (233,127)
Income tax benefit (expense) computed at applicable tax rates (25%)	(3,764)	(23,454)	(14,904)	58,282
Non-deductible expenses	(315)	(1,969)	(2,161)	(777)
Taxable income			(1,178)	(11,245)
Research and development expenses	692	4,313	2,982	533
Effect of tax holidays			827	3,621
Preferential rate	1,163	7,245	371
Current and deferred tax rate differences	290	1,804	1,331	553
International rate differences	(2,523)	(15,716)	(1,020)	(70,503)
Tax exempted income	423	2,635
Outside basis difference				613
Unrecognized tax benefits	(103)	(641)	(856)	(364)
Deferred tax expense	(593)	(3,695)		(105)
Change in valuation allowance	(845)	(5,263)	(32)	17,804
Prior year provision to return true up	(229)	(1,418)	963
Income tax benefit	$ (5,804)	¥ (36,159)	¥ (13,677)	¥ (1,588)

Tax Holiday Benefit Per Basic and Diluted Earnings per share (Detail) - ¥ / shares	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Income Tax Holiday [Line Items]
Basic	¥ 0.005	¥ 0.050
Diluted	¥ 0.004	¥ 0.050

Significant Components of Deferred Taxes (Detail) ¥ in Thousands, $ in Thousands	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)
Current
Allowance for doubtful accounts	$ 8	¥ 53	¥ 314
Accrued salary and welfare	576	3,589	2,407
Accrued expenses	225	1,403	512
Contingent consideration payables-current	562	3,498	1,727
Deferred government grant	11	67
Valuation allowance	(4)	(25)	(88)
Net current deferred tax assets	1,378	8,585	4,872
Non-current
Tax losses	1,378	8,586	5,333
Property and equipment	1,140	7,102	4,824
Deferred government grant	729	4,540	1,281
Contingent consideration payables-non current	142	883	5,866
Others			23
Valuation allowance	(1,586)	(9,880)	(4,554)
Net non-current deferred tax assets	1,803	11,231	12,773
Total deferred tax assets	3,181	19,816	17,645
Non-current
Intangible assets	6,699	41,736	39,682
Capitalized interest	470	2,930
Total deferred tax liabilities	$ 7,169	¥ 44,666	¥ 39,682

Unrecognized Tax Benefits (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Balance at beginning of year	$ 4,077	¥ 25,403	¥ 5,035
Reclass to income tax payable	(2,557)	(15,931)
Additions based on tax positions related to the current year	133	830	20,368
Balance at end of year	$ 1,653	¥ 10,302	¥ 25,403

Discontinued Operations (Detail) ¥ in Thousands	12 Months Ended
Discontinued Operations (Detail) ¥ in Thousands	Dec. 31, 2010 CNY (¥)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net Revenue	¥ 3,726
Cost of revenue	(3,846)
Gross loss	(120)
Operating expenses:
Sales and marketing expenses	(4,032)
General and administrative expenses	(8,167)
Research and development expenses	(3,046)
Loss before income tax expenses	(15,365)
Income tax benefit	2,413
Loss from discontinued operations	¥ (12,952)

Related Party Transactions (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)	Dec. 31, 2010 CNY (¥)	Dec. 31, 2012 CNY (¥)	Oct. 01, 2011 CNY (¥)
Shanghai Cloud 21Vianet Network Co., Ltd. ("Shanghai Cloud")
Related Party Transaction [Line Items]
Purchase equity interests						¥ 18,200
VEE \| Office Rental
Related Party Transaction [Line Items]
Revenue from related party transactions				¥ 51
VEE \| Service Revenue
Related Party Transaction [Line Items]
Revenue from related party transactions			¥ 303	1,061
BJ Wanwei \| Office Rental
Related Party Transaction [Line Items]
Revenue from related party transactions				60
BJ Wanwei \| Service Revenue
Related Party Transaction [Line Items]
Revenue from related party transactions				1,006
BJ Wanwei \| Sales of property and equipment
Related Party Transaction [Line Items]
Revenue from related party transactions				4,526
SH Guotong \| Service Revenue
Related Party Transaction [Line Items]
Revenue from related party transactions	$ 4,361	¥ 27,171	8,181	11,322
GZ Juliang \| Service Revenue
Related Party Transaction [Line Items]
Revenue from related party transactions			268	1,173
21V BJ \| Service Revenue
Related Party Transaction [Line Items]
Revenue from related party transactions			3	5
21V FS \| Service Revenue
Related Party Transaction [Line Items]
Revenue from related party transactions			39	4
Huo Ju Lian He \| Service Revenue
Related Party Transaction [Line Items]
Revenue from related party transactions				896
CE BJ \| Service Revenue
Related Party Transaction [Line Items]
Revenue from related party transactions		1	854	541
CE BJ \| Sales of property and equipment
Related Party Transaction [Line Items]
Revenue from related party transactions				4,396
CE BJ \| Sales of Intangible Assets
Related Party Transaction [Line Items]
Revenue from related party transactions				428
CE Soft BJ \| Service Revenue
Related Party Transaction [Line Items]
Revenue from related party transactions	35	215	90	2
CE Soft BJ \| Equipment
Related Party Transaction [Line Items]
Related party transaction, purchase of equipment	83	515
CE Soft BJ \| Sales of property and equipment
Related Party Transaction [Line Items]
Revenue from related party transactions				1,518
CE Soft BJ \| Sales of Intangible Assets
Related Party Transaction [Line Items]
Revenue from related party transactions				466
Tianjin Yunlifang \| Service Revenue
Related Party Transaction [Line Items]
Revenue from related party transactions			93
SH Guotong \| Services
Related Party Transaction [Line Items]
Related party transaction expense	1,066	6,639	2,554	2,905
SH Guotong \| Equipment
Related Party Transaction [Line Items]
Related party transaction, purchase of equipment	291	1,812
21V NB \| Services
Related Party Transaction [Line Items]
Related party transaction expense				149
21V NB \| Equipment Rental
Related Party Transaction [Line Items]
Related party transaction expense			442
21Vianet (Xi'an) Technology Co., Ltd. ("Xi'an Tech") \| Services
Related Party Transaction [Line Items]
Related party transaction expense	887	5,526	8,836
21Vianet (Xi'an) Technology Co., Ltd. ("Xi'an Tech") \| Equipment Rental
Related Party Transaction [Line Items]
Related party transaction expense			897	13,178
21Vianet (Xi'an) Technology Co., Ltd. ("Xi'an Tech") \| Equipment
Related Party Transaction [Line Items]
Related party transaction, purchase of equipment			39,896	27,633
21V QD \| Sales of Intangible Assets
Related Party Transaction [Line Items]
Revenue from related party transactions				23
Bitcool Media
Related Party Transaction [Line Items]
Related party transaction, loans provided	2,371				¥ 14,771
Revenue from related party transactions	41	¥ 253
Chief Executive Officer and Director
Related Party Transaction [Line Items]
Issuance of ordinary shares for Chen Sheng's past services- Sunrise				¥ 206,037
21V Xi'an
Related Party Transaction [Line Items]
Purchase equity interests	$ 2,564				¥ 15,977
aBitCool Incorporated \| Telehouse Beijing Company Limited
Related Party Transaction [Line Items]
Purchase equity interests			8,200
Twenty One Vianet Zhi Hui Ke Ji Company Limited \| Shanghai Cloud 21Vianet Network Co., Ltd. ("Shanghai Cloud")
Related Party Transaction [Line Items]
Purchase equity interests			18,191
Twenty One Vianet Zhi Hui Ke Ji Company Limited \| Shenzhen Cloud Information Technology Co., Ltd. ("Shenzhen Cloud")
Related Party Transaction [Line Items]
Purchase equity interests			7,900
Beijing 21Vianet Zhi Hui Neng Yuan System Technology Company Limited \| Shanghai Cloud 21Vianet Network Co., Ltd. ("Shanghai Cloud")
Related Party Transaction [Line Items]
Purchase equity interests			¥ 9

Related Party Transactions (Parenthetical) (Detail)	Dec. 31, 2012	Dec. 31, 2011
Telehouse Beijing Company Limited \| aBitCool Incorporated
Related Party Transaction [Line Items]
Percentage of ownership acquired	10.00%	10.00%
Shanghai Cloud 21Vianet Network Co., Ltd. ("Shanghai Cloud") \| Twenty One Vianet Zhi Hui Ke Ji Company Limited
Related Party Transaction [Line Items]
Percentage of ownership acquired		99.95%
Shanghai Cloud 21Vianet Network Co., Ltd. ("Shanghai Cloud") \| Beijing 21Vianet Zhi Hui Neng Yuan System Technology Company Limited
Related Party Transaction [Line Items]
Percentage of ownership acquired		0.05%
Shenzhen Cloud Information Technology Co., Ltd. ("Shenzhen Cloud") \| Twenty One Vianet Zhi Hui Ke Ji Company Limited
Related Party Transaction [Line Items]
Percentage of ownership acquired		100.00%

Related Party Balances (Detail)
¥ in Thousands, $ in Thousands

Dec. 31, 2012

USD ($)

Dec. 31, 2012

CNY (¥)

Dec. 31, 2011

CNY (¥)

$ 3,006

¥ 18,726

¥ 41,643

16,860

105,037

96,618

13,855

86,316

124,493

SH Guotong

594

3,702

Bitcool Media

2,412

15,024

CE BJ

CE Soft BJ

Nanjing Chiguan Technology Development Company Limited

2,480

Chen Sheng

^[1]

4,053

Zhang Jun

^[1]

12,483

Hsiao Shang-Wen

^[1]

1,452

Xiao Feng

^[1]

8,269

Lai Ningning

^[1]

8,269

Wang Yanguo

^[1]

2,087

Lin Xiaodong

^[1]

1,937

Li Heyang

^[1]

401

Li Mei

Tianjin GuanBang Network Technology Company Limited

^[1]

109

6,355

39,592

21,209

1,079

6,723

40,216

Concept Network Limited

7,665

47,755

43,656

Beijing Shi Dai Tong Lian Technology Company Limited

7,061

43,992

84,277

21Vianet (Xi'an) Technology Co., Ltd. ("Xi'an Tech")

25,069

¥ 6,684

Beijing Huibang

131

815

Sellers of Fastweb

2,709

16,875

$ 5,715

¥ 35,601

[1]	Collectively, "the Nine Executives"

Related Party Transactions - Additional Information (Detail) - Bitcool Media ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)
Transactions with Third Party [Line Items]
Annual interest rate on loan provided	3.00%	3.00%
Interest Income from related pary loan	$ 41	¥ 253
Loan maturity date	2013-04	2013-04

Restricted Net Asset - Additional Information (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)
Statutory Accounting Practices [Line Items]
Restricted net asset, PRC generally accepted accounting principles	$ 211,326	¥ 1,316,583
PRC \| Minimum
Statutory Accounting Practices [Line Items]
Minimum required Percentage of annual after-tax profit to the general statutory reserve	10.00%	10.00%
PRC \| Maximum
Statutory Accounting Practices [Line Items]
Maximum requirement of each of the Entity's PRC Subsidiaries' after-tax profits to be allocated to a general reserve fund as a percentage of each Subsidiaries' registered capital	50.00%

Basic and Diluted Earnings Loss Per Share (Detail) ¥ / shares in Units, $ / shares in Units, ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($) $ / shares shares	Dec. 31, 2012 CNY (¥) ¥ / shares shares	Dec. 31, 2011 CNY (¥) ¥ / shares shares	Dec. 31, 2010 CNY (¥) ¥ / shares shares
Numerator:
Net (loss) profit from continuing operations	$ 9,252	¥ 57,656	¥ 45,939	¥ (234,715)
Less: net profit attributable to non-controlling interest	(214)	(1,332)	(27,495)	(7,722)
Net (loss) profit from continuing operations attributable to ordinary shareholders	9,038	56,324	18,444	(242,437)
Loss from discontinued operations \| ¥				(12,952)
Net (loss) income attributable to the company's ordinary shareholders	$ 9,038	¥ 56,324	¥ 18,444	¥ (255,389)
Denominator:
Weighted-average number of shares outstanding-basic	342,533,167	342,533,167	259,595,677	71,526,320
Weighted-average number of stock options and RSUs granted in connection with the stock option plan	14,251,042	14,251,042	57,211,984
Dilutive effect of preferred shares				110,966,180
Weighted-average number of shares outstanding-diluted	356,784,209	356,784,209	316,807,661	182,492,500
(Loss) earnings per share-Basic:
Net (loss) profit from continuing operations \| (per share)	$ 0.03	¥ 0.16	¥ 0.07	¥ (3.39)
Loss from discontinued operations \| ¥ / shares				(0.18)
Basic \| (per share)	0.03	0.16	0.07	(3.57)
(Loss) earnings per share-Diluted:
Net (loss) profit from continuing Operations \| (per share)	0.03	0.16	0.06	(3.39)
Loss from discontinued operations \| ¥ / shares				(0.18)
Diluted \| (per share)	$ 0.03	¥ 0.16	¥ 0.06	¥ (3.57)

Loss Earnings Per Share - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2011 shares	Mar. 31, 2011 $ / shares
Earnings Per Share Disclosure [Line Items]
shares, stock split		10
Ordinary shares, par value		$ 0.00001
Convertible preferred shares, par value		$ 0.00001
Ordinary shares issued to share depositary bank \| shares	8,207,178
Convertible Preferred Stock
Earnings Per Share Disclosure [Line Items]
shares, stock split		10

Share Capital - Additional Information (Detail)	1 Months Ended
Share Capital - Additional Information (Detail)	Jul. 31, 2012 shares	Mar. 31, 2011 $ / shares shares	Oct. 31, 2010 Vote $ / shares shares
Stockholders Equity Note [Line Items]
Ordinary shares, par value \| $ / shares		$ 0.00001
Ordinary shares, shares issued			71,526,320
Ordinary shares, shares outstanding			71,526,320
Shares repurchased from Sunrise	2,686,965
Class A Ordinary Shares
Stockholders Equity Note [Line Items]
Ordinary shares, shares authorized		470,000,000	300,000,000
Ordinary shares, par value \| $ / shares		$ 0.00001	$ 0.00001
Entitled vote per ordinary share \| Vote			1
Class B Ordinary Shares
Stockholders Equity Note [Line Items]
Ordinary shares, shares authorized			300,000,000
Ordinary shares, par value \| $ / shares			$ 0.00001
Entitled vote per ordinary share \| Vote			10
Conversion ratio, Class B ordinary share into Class A Ordinary Share			1
Series A preferred shares
Stockholders Equity Note [Line Items]
Convertible preferred shares, issued			41,408,340
Convertible preferred shares, outstanding			41,408,340
Series B preferred shares
Stockholders Equity Note [Line Items]
Convertible preferred shares, issued			69,557,840
Convertible preferred shares, outstanding			69,557,840

Reconciliation of Liabilities Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs Level Three (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance		¥ 214,427	¥ 136,741
Changes in the fair value		17,430	63,185
Transfers in and/or out of Level 3
Ending Balance	$ 30,584	190,538	214,427
Payment of cash consideration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Contingent consideration settlement		(59,598)	(82,195)
Payment of stock consideration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Contingent consideration settlement			(20,156)
Reclassification to equity upon resolution of contingencies
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Contingent consideration settlement		(97,761)	(129,785)
Managed Network Entities
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Contingent purchase consideration payable			169,168
Guangzhou Gehua Network Technology and Development Co., ("Gehua")
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Contingent purchase consideration payable			¥ 77,469
Fastweb International Holdings
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Contingent purchase consideration payable		¥ 116,040

Fair Value Measurement - Additional Information (Detail) - Dec. 31, 2012 ¥ in Thousands, $ in Thousands	USD ($)	CNY (¥)
Managed Network Entities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of contingent consideration in shares	$ 9,079	¥ 56,564
Fastweb Acquisition
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of contingent consideration in shares	$ 6,613	¥ 41,197

Capital Commitments (Detail) - Dec. 31, 2012 - Capital Commitments - Computer and Network Equipment and Construction in Progress ¥ in Thousands, $ in Thousands	USD ($)	CNY (¥)
Long-term Purchase Commitment [Line Items]
2013	$ 22,751	¥ 141,740
2014	660	4,114
2015	680	4,239
Purchase Obligation, Total	$ 24,091	¥ 150,093

Commitments and Contingencies - Additional Information (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)	Dec. 31, 2010 CNY (¥)	Dec. 31, 2012 CNY (¥)
Commitments and Contingencies [Line Items]
Investment commitments					¥ 50,500
Noncurrent Liability
Commitments and Contingencies [Line Items]
Accrual for unrecognized tax benefits and interest	$ 1,981				¥ 12,340
PRC
Commitments and Contingencies [Line Items]
Operating leases, total rental expenses	$ 3,865	¥ 24,082	¥ 15,363	¥ 7,346

This element represents the payments that the lessee is obligated to make or can be required to make in connection with a property under the terms of an agreement classified as an operating lease, excluding contingent rentals and a guarantee by the lessee of the lessor's debt and the lessee's obligation to pay (apart from the rental payments) executory costs such as insurance, maintenance, and taxes.

Future Minimum Lease Payments Under Non Cancelable Operating Leases (Detail) - Dec. 31, 2012 ¥ in Thousands, $ in Thousands	USD ($)	CNY (¥)
Operating Leased Assets [Line Items]
2013	$ 13,383	¥ 83,377
2014	13,194	82,202
2015	12,718	79,235
2016	12,192	75,958
2017 and thereafter	57,948	361,019
Operating Leases, Future Minimum Payments Due, Total	$ 109,435	¥ 681,791

Purchase Commitments (Detail) - Dec. 31, 2012 - Purchase Commitments - Bandwidth and Cabinet Capacity ¥ in Thousands, $ in Thousands	USD ($)	CNY (¥)
Long-term Purchase Commitment [Line Items]
2013	$ 97,158	¥ 605,304
2014	11,731	73,083
2015	4,735	29,498
2016	796	4,962
2017 and thereafter	8,521	53,086
Purchase Obligation, Total	$ 122,941	¥ 765,933

Subsequent Events - Additional Information (Detail) ¥ in Thousands, $ in Thousands	1 Months Ended
	Mar. 31, 2013	Feb. 28, 2013 CNY (¥)	Mar. 22, 2013 USD ($)	Mar. 22, 2013 CNY (¥)
Lease Agreements
Subsequent Event [Line Items]
Lease term		20 years
Rent-free period		3 years 6 months
Lease payment for the next 9 years after rent-free period ends		¥ 471,628
Series of Individually Immaterial Business Acquisitions \| Target Companies Acquisition
Subsequent Event [Line Items]
Business acquisition, equity interests acquired		100.00%
Business acquisition, cash consideration		¥ 17,500
Issuance of Debt
Subsequent Event [Line Items]
Aggregate principal amount of bonds issued			$ 160,500	¥ 1,000,000
Interest rate on bonds issued			7.875%	7.875%
Bonds maturity date			2016	2016
Interest payment beginning date	Sep. 22, 2013
Interest payment, frequency	Semi-annually

Parent Company Only Condensed Balance Sheets (Detail) ¥ in Thousands, $ in Thousands	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)
Current assets
Restricted cash	$ 30,781	¥ 191,766	¥ 4,578
Short-term investment	35,746	222,701	894,540
Prepaid expenses and other current assets	15,370	95,756	47,575
Amount due from subsidiaries	157,340	980,246	497,851
Total current assets	202,752	1,263,157	1,551,221
Non-current assets
Restricted cash	35,574	221,628
Investments	9,245	57,599	8,200
Total non-current assets	275,079	1,713,762	851,731
Total assets	477,831	2,976,919	2,402,952
Current liabilities:
Accrued expenses and other payables	26,890	167,498	124,326
Amount due to a subsidiary			114
Amount due to related parties	16,860	105,037	96,618
Total current liabilities	130,042	810,147	462,537
Non-current liabilities
Total non-current liabilities	44,536	277,467	270,691
Total liabilities	174,578	1,087,614	733,228
Shareholders' equity:
Additional paid-in capital	528,861	3,294,855	3,277,658
Accumulated other comprehensive loss	(9,208)	(57,367)	(54,779)
Accumulated deficit	(220,204)	(1,371,877)	(1,418,167)
Treasury stock	(3,323)	(20,702)	(168,018)
Total shareholders' equity	300,283	1,870,803	1,652,554
Total liabilities and shareholders' equity	477,831	2,976,919	2,402,952
Parent Company
Current assets
Cash	2,263	14,097	34,224
Restricted cash	30,497	190,000
Short-term investment	19,695	122,701	894,540
Prepaid expenses and other current assets	2,979	18,562	16,739
Amount due from subsidiaries	157,340	980,246	497,851
Total current assets	212,774	1,325,606	1,443,354
Non-current assets
Restricted cash	16,051	100,000
Investments	80,288	500,204	212,110
Total non-current assets	96,339	600,204	212,110
Total assets	309,113	1,925,810	1,655,464
Current liabilities:
Accrued expenses and other payables	406	2,531	2,796
Amount due to a subsidiary			114
Amount due to related parties	2,709	16,875
Total current liabilities	3,115	19,406	2,910
Non-current liabilities
Amount due to related parties	5,715	35,601
Total non-current liabilities	5,715	35,601
Total liabilities	8,830	55,007	2,910
Shareholders' equity:
Additional paid-in capital	515,709	3,212,927	3,172,372
Accumulated other comprehensive loss	(9,828)	(61,232)	(57,290)
Accumulated deficit	(198,746)	(1,238,209)	(1,294,533)
Treasury stock	(6,856)	(42,706)	(168,018)
Total shareholders' equity	300,283	1,870,803	1,652,554
Total liabilities and shareholders' equity	309,113	1,925,810	1,655,464
Class A Ordinary Shares \| Parent Company
Shareholders' equity:
Ordinary shares	3	19	13
Class B Ordinary Shares \| Parent Company
Shareholders' equity:
Ordinary shares	$ 1	¥ 4	¥ 10

Parent Company Only Condensed Statements of Operations (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Dec. 31, 2011 CNY (¥)	Dec. 31, 2010 CNY (¥)
Operating expenses
General and administrative expenses	$ (24,640)	¥ (153,512)	¥ (82,926)	¥ (282,298)
Operating (loss) profit	12,991	80,939	14,905	(232,806)
(Loss) profit from continuing operations before income taxes	15,056	93,815	59,616	(233,127)
Income tax expense	(5,804)	(36,159)	(13,677)	(1,588)
Net (loss) income attributable to the company's ordinary shareholders	9,038	56,324	18,444	(255,389)
Parent
Operating expenses
General and administrative expenses	(12,618)	(78,611)	(49,424)	(281,113)
Operating (loss) profit	(12,618)	(78,611)	(49,424)	(281,113)
Other (expenses) income	1,694	10,570	45,344	(49,931)
Investment income	19,962	124,365	22,524	75,655
(Loss) profit from continuing operations before income taxes	9,038	56,324	18,444	(255,389)
Income tax expense
Net (loss) income attributable to the company's ordinary shareholders	$ 9,038	¥ 56,324	¥ 18,444	¥ (255,389)

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Net Income
-URI http://asc.fasb.org/extlink&oid=6518256

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04.19)
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.18)
-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04.22)
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Other Comprehensive Income
-URI http://asc.fasb.org/extlink&oid=6519514

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e565-108580

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 10, 15
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph A7
-Appendix A

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 87-21
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 19
-Article 5

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 28, 29, 30
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 16: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 20
-Article 9

Condensed Financial Statements, Captions [Line Items]

Parent Company Only Condensed Statements of Cash Flows (Detail)
¥ in Thousands, $ in Thousands

12 Months Ended

Dec. 31, 2012

USD ($)

Dec. 31, 2012

CNY (¥)

Dec. 31, 2011

CNY (¥)

Dec. 31, 2010

CNY (¥)

Net cash used in operating activities

$ 27,917

¥ 173,923

¥ 166,135

¥ 81,372

Net cash (used in) generated from investing activities

(28,197)

(175,670)

(1,268,054)

(616)

Net cash generated from (used in) financing activities

3,844

23,952

1,443,947

(69,498)

Net increase (decrease) in cash

3,509

21,865

327,133

11,258

Cash and cash equivalents at beginning of year

65,873

410,389

83,256

71,998

Cash and cash equivalents at end of year

69,382

^[1]

432,254

^[1]

410,389

83,256

Parent

Condensed Financial Statements, Captions [Line Items]

Net cash used in operating activities

(1,011)

(6,300)

(712)

Net cash (used in) generated from investing activities

43,799

272,873

(1,349,501)

Net cash generated from (used in) financing activities

(46,019)

(286,700)

1,382,900

1,537

Net increase (decrease) in cash

(3,231)

(20,127)

32,687

1,537

Cash and cash equivalents at beginning of year

5,494

34,224

1,537

Cash and cash equivalents at end of year

$ 2,263

¥ 14,097

¥ 34,224

¥ 1,537

[1]	As of December 31, 2012, besides these cash and cash equivalents, the Company also holds fixed rate time deposits with maturities greater than three months of RMB222,701 (US$35,746).

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash
-URI http://asc.fasb.org/extlink&oid=6506951

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6676-107765

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3044-108585

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash Equivalents
-URI http://asc.fasb.org/extlink&oid=6507016

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.1)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 1
-Article 5

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 7, 26
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 7
-Footnote 1
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 8, 9
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.