VNET [21Vianet] 6-K: (Original Filing)

[21Vianet Group, Inc. Reports First Quarter 2016 Unaudited Financial Results Live Conference Call to be Held at 8:00 PM U.S. Eastern Time, May 26, 2016 BEIJING, May 26, 2016 (GLOBE NEWSWIRE) — 21Vianet Group, Inc. (Nasdaq: VNET) (“21Vianet” or the “Company”), a leading carrier-neutral internet data center services provider in China, today announced its unaudited financial results for the first] [FORM 6-K 21Vianet Group, Inc. M5, 1 Jiuxianqiao East Road, Chaoyang District Beijing 100016 The People’s Republic of China (86 10) 8456 2121 x ¨ Form 20-F ¨ ¨ 21Vianet Group, Inc. Terry Wang Chief Financial Officer 6-K 1 d202287d6k.htm FORM 6-K]

VNET [21Vianet] 6-K: 21Vianet Group, Inc. Reports First Quarter 2016 Unaudited

[21Vianet Group, Inc. Reports First Quarter 2016 Unaudited Financial Results Live Conference Call to be Held at 8:00 PM U.S. Eastern Time, May 26, 2016 BEIJING, May 26, 2016 (GLOBE NEWSWIRE) — 21Vianet Group, Inc. (Nasdaq: VNET) (“21Vianet” or the “Company”), a leading carrier-neutral internet data center services provider in China, today announced its unaudited financial results for the first] [FORM 6-K 21Vianet Group, Inc. M5, 1 Jiuxianqiao East Road, Chaoyang District Beijing 100016 The People’s Republic of China (86 10) 8456 2121 x ¨ Form 20-F ¨ ¨ 21Vianet Group, Inc. Terry Wang Chief Financial Officer 6-K 1 d202287d6k.htm FORM 6-K]

VNET [21Vianet] 6-K: (Original Filing)

[21Vianet Announces US$388 Million Investment From Tus-Holdings BEIJING, May 23, 2016–21Vianet Group, Inc. (Nasdaq: VNET) (“21Vianet” or the “Company”), a leading carrier-neutral internet data center services provider in China, announced today that Tus-Holdings Co., Ltd. (“Tus-Holdings”), a large integrated enterprise established in reliance on Tsinghua University, has, through its affiliated investment vehicle, entered into definitive share subscription agreement (“Share Subscription] [FORM 6-K 21Vianet Group, Inc. M5, 1 Jiuxianqiao East Road, Chaoyang District Beijing 100016 The People’s Republic of China (86 10) 8456 2121 x ¨ Form 20-F 21Vianet Group, Inc. By : Terry Wang Chief Financial Officer 6-K 1 d109483d6k.htm FORM 6-K]

VNET [21Vianet] 6-K: 21Vianet Announces US$388 Million Investment From Tus-Holdings BEIJING,

[21Vianet Announces US$388 Million Investment From Tus-Holdings BEIJING, May 23, 2016–21Vianet Group, Inc. (Nasdaq: VNET) (“21Vianet” or the “Company”), a leading carrier-neutral internet data center services provider in China, announced today that Tus-Holdings Co., Ltd. (“Tus-Holdings”), a large integrated enterprise established in reliance on Tsinghua University, has, through its affiliated investment vehicle, entered into definitive share subscription agreement (“Share Subscription] [FORM 6-K 21Vianet Group, Inc. M5, 1 Jiuxianqiao East Road, Chaoyang District Beijing 100016 The People’s Republic of China (86 10) 8456 2121 x ¨ Form 20-F 21Vianet Group, Inc. By : Terry Wang Chief Financial Officer 6-K 1 d109483d6k.htm FORM 6-K]

VNET [21Vianet] 6-K: (Original Filing)

[21Vianet Group, Inc. Announces Issuance of RMB1.75 Billion Convertible Bonds by its main operating entity BEIJING, April 29, 2016 (GLOBE NEWSWIRE) — 21Vianet Group, Inc. (Nasdaq:VNET) (“21Vianet” or the “Company”), a leading carrier-neutral internet data center services provider in China, today announced that Beijing Yiyun Network Technology Co., Ltd. (“Beijing Yiyun”), a various interest entity of the Company and the] [21Vianet Group, Inc. Terry Wang Chief Financial Officer — Press Release 6-K 1 d177836d6k.htm FORM 6-K]

VNET [21Vianet] 6-K: 21Vianet Group, Inc. Announces Issuance of RMB1.75 Billion

[21Vianet Group, Inc. Announces Issuance of RMB1.75 Billion Convertible Bonds by its main operating entity BEIJING, April 29, 2016 (GLOBE NEWSWIRE) — 21Vianet Group, Inc. (Nasdaq:VNET) (“21Vianet” or the “Company”), a leading carrier-neutral internet data center services provider in China, today announced that Beijing Yiyun Network Technology Co., Ltd. (“Beijing Yiyun”), a various interest entity of the Company and the] [21Vianet Group, Inc. Terry Wang Chief Financial Officer — Press Release 6-K 1 d177836d6k.htm FORM 6-K]

VNET [21Vianet] 6-K: (Original Filing)

[21Vianet Group, Inc. Filed Its Annual Report on Form 20-F About 21Vianet 21Vianet Group, Inc. is a leading carrier-neutral Internet data center services provider in China. 21Vianet provides hosting and related services, managed network services, cloud services, content delivery network services, last-mile wired broadband services and business VPN services, improving the reliability, security and speed of its customers’ Internet infrastructure.] [FORM 6-K 21Vianet Group, Inc. M5, 1 Jiuxianqiao East Road, Chaoyang District Beijing 100016 The People’s Republic of China (86 10) 8456 2121 x ¨ ¨ ¨ 21Vianet Group, Inc. By : Name : Terry Wang Title : Chief Financial Officer 6-K 1 d171116d6k.htm FORM 6-K]

VNET [21Vianet] 20-F: (Original Filing)

[INTRODUCTION 1 1 PART I 3 ITEM 1. IDENTITY OF DIRECTORS, SENIOR MANAGEMENT AND ADVISERS 3 ITEM 2. OFFER STATISTICS AND EXPECTED TIMETABLE 3 ITEM 3. KEY INFORMATION 3 ITEM 4. INFORMATION ON THE COMPANY 45 ITEM 4A. UNRESOLVED STAFF COMMENTS 67 ITEM 5. OPERATING AND FINANCIAL REVIEW AND PROSPECTS 67 ITEM 6. DIRECTORS, SENIOR MANAGEMENT AND EMPLOYEES 96 ITEM] [List of Significant Subsidiaries and Principal Consolidated Affiliated Entities* Significant Subsidiaries Jurisdiction of Incorporation 21ViaNet Group Limited Hong Kong 21Vianet Mobile Limited Hong Kong Hongkong Fastweb Holdings Co., Limited Hong Kong Diyixian.com Limited Hong Kong DYXNet Limited Hong Kong Dermot Holdings Limited British Virgin Islands WiFire Group Inc. British Virgin Islands Fastweb International Holdings Cayman Islands 21Vianet Data Center Co.,] [I, Steve Zhang, certify that: 1. I have reviewed this annual report on Form 20-F of 21Vianet Group, Inc.; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made,] [Certification by the Principal Financial Officer I, Terry Wang, certify that: 1. I have reviewed this annual report on Form 20-F of 21Vianet Group, Inc.; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances] [(1) (2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company. Steve Zhang Chief Executive Officer EX-13.1 5 d124901dex131.htm EX-13.1] [Certification by the Principal Financial Officer (1) (2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company. Terry Wang Chief Financial Officer EX-13.2 6 d124901dex132.htm EX-13.2] [CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in the Registration Statements: i) Form S-8 No. 333-177273, pertaining to the 2010 Share Incentive Plan; iii) Form S-8 No.333-197495, pertaining to the 2014 Share Incentive Plan; and (Form 20-F) of 21Vianet Group, Inc. of our reports dated April 12, 2016, with respect to the consolidated] [Consent of Beijing DHH Law Firm To: 21Vianet Group, Inc. M5, 1 Jiuxianqiao East Road Chaoyang District, Beijing 100016 the People’s Republic of China Date Dear Sirs, Yours faithfully, Beijing DHH Law Firm EX-15.2 8 d124901dex152.htm EX-15.2]

VNET [21Vianet] 20-F: INTRODUCTION 1 1 PART I 3 ITEM 1.

[INTRODUCTION 1 1 PART I 3 ITEM 1. IDENTITY OF DIRECTORS, SENIOR MANAGEMENT AND ADVISERS 3 ITEM 2. OFFER STATISTICS AND EXPECTED TIMETABLE 3 ITEM 3. KEY INFORMATION 3 ITEM 4. INFORMATION ON THE COMPANY 45 ITEM 4A. UNRESOLVED STAFF COMMENTS 67 ITEM 5. OPERATING AND FINANCIAL REVIEW AND PROSPECTS 67 ITEM 6. DIRECTORS, SENIOR MANAGEMENT AND EMPLOYEES 96 ITEM] [List of Significant Subsidiaries and Principal Consolidated Affiliated Entities* Significant Subsidiaries Jurisdiction of Incorporation 21ViaNet Group Limited Hong Kong 21Vianet Mobile Limited Hong Kong Hongkong Fastweb Holdings Co., Limited Hong Kong Diyixian.com Limited Hong Kong DYXNet Limited Hong Kong Dermot Holdings Limited British Virgin Islands WiFire Group Inc. British Virgin Islands Fastweb International Holdings Cayman Islands 21Vianet Data Center Co.,] [I, Steve Zhang, certify that: 1. I have reviewed this annual report on Form 20-F of 21Vianet Group, Inc.; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made,] [Certification by the Principal Financial Officer I, Terry Wang, certify that: 1. I have reviewed this annual report on Form 20-F of 21Vianet Group, Inc.; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances] [(1) (2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company. Steve Zhang Chief Executive Officer EX-13.1 5 d124901dex131.htm EX-13.1] [Certification by the Principal Financial Officer (1) (2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company. Terry Wang Chief Financial Officer EX-13.2 6 d124901dex132.htm EX-13.2] [CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in the Registration Statements: i) Form S-8 No. 333-177273, pertaining to the 2010 Share Incentive Plan; iii) Form S-8 No.333-197495, pertaining to the 2014 Share Incentive Plan; and (Form 20-F) of 21Vianet Group, Inc. of our reports dated April 12, 2016, with respect to the consolidated] [Consent of Beijing DHH Law Firm To: 21Vianet Group, Inc. M5, 1 Jiuxianqiao East Road Chaoyang District, Beijing 100016 the People’s Republic of China Date Dear Sirs, Yours faithfully, Beijing DHH Law Firm EX-15.2 8 d124901dex152.htm EX-15.2]

VNET [21Vianet] 6-K: (Original Filing)

[21Vianet Group, Inc. Reports Fourth Quarter and Full Year 2015 Unaudited Financial Results Live Conference Call to be Held at 8:00 PM U.S. Eastern Time, March 10, 2016 BEIJING, March 10, 2016 (GLOBE NEWSWIRE) — 21Vianet Group, Inc. (Nasdaq: VNET) (“21Vianet” or the “Company”), a leading carrier-neutral internet data center services provider in China, today announced its unaudited financial results] [21Vianet Group, Inc. By : : Terry Wang : Chief Financial Officer Press Release 6-K 1 d158757d6k.htm FORM 6-K]

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