VNET [21Vianet] SC 13D/A: EXECUTION VERSION PURCHASE AGREEMENT dated as of December

[EXECUTION VERSION PURCHASE AGREEMENT dated as of December 1, 2014 between 21VIANET GROUP, INC. and ESTA INVESTMENTS PTE. LTD. TABLE OF CONTENTS ARTICLE 1 Definitions . Definitions Section 1.01 1 . Other Definitional And Interpretive Provisions Section 1.02 5 ARTICLE 2 Sale And Purchase Of The Sale Shares . Agreement to Sell and Purchase Section 2.01 6 . Closing Section] [(Name of Issuer) American Depositary Shares, each representing six Class A ordinary shares, par value US$0.00001 per share (Title of Class of Securities) 90138A996 (CUSIP Number) Jonathan Selvadoray Temasek International Pte. Ltd. 60B Orchard Road, #06-18 Tower 2 The Atrium@Orchard Singapore 238891 Telephone: +65 6828 2442 With Copies to: Miranda So Davis Polk & Wardwell Hong Kong Club Building 3A]

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

[21Vianet Group, Inc. Reports Unaudited Third Quarter 2014 Financial Results 3Q14 Net Revenues Up 51.5% YOY to RMB778.5 Million 3Q14 Adjusted EBITDA Up 61.3% YOY to RMB153.9 Million Live Conference Call to be Held at 8:00 PM U.S. Eastern Time, November 25, 2014 BEIJING, Nov. 25, 2014 (GLOBE NEWSWIRE) — 21Vianet Group, Inc. (Nasdaq: VNET) (“21Vianet” or the “Company”), a] [21Vianet Group, Inc. By : Name : Shang-Wen Hsiao Title : Chief Financial Officer 6-K 1 d828297d6k.htm FORM 6-K]

VNET [21Vianet] 6-K: 21Vianet Group, Inc. Reports Unaudited Third Quarter 2014

[21Vianet Group, Inc. Reports Unaudited Third Quarter 2014 Financial Results 3Q14 Net Revenues Up 51.5% YOY to RMB778.5 Million 3Q14 Adjusted EBITDA Up 61.3% YOY to RMB153.9 Million Live Conference Call to be Held at 8:00 PM U.S. Eastern Time, November 25, 2014 BEIJING, Nov. 25, 2014 (GLOBE NEWSWIRE) — 21Vianet Group, Inc. (Nasdaq: VNET) (“21Vianet” or the “Company”), a] [21Vianet Group, Inc. By : Name : Shang-Wen Hsiao Title : Chief Financial Officer 6-K 1 d828297d6k.htm FORM 6-K]

VNET [21Vianet] CORRESP: (Original Filing)

[21Vianet Group, Inc. M5, 1 Jiuxianqiao East Road Chaoyang District Beijing, 100016 The People’s Republic of China November 28, 2014 VIA EDGAR Craig Wilson, Senior Assistant Chief Accountant Melissa Walsh, Staff Accountant Jeffrey Kauten, Staff Attorney Matthew Crispino, Staff Attorney Division of Corporation Finance 100 F Street, N.E. Re: 21Vianet Group, Inc. (the “Company”) Form 20-F for the Fiscal Year]

VNET [21Vianet] CORRESP: 21Vianet Group, Inc. M5, 1 Jiuxianqiao East Road

[21Vianet Group, Inc. M5, 1 Jiuxianqiao East Road Chaoyang District Beijing, 100016 The People’s Republic of China November 28, 2014 VIA EDGAR Craig Wilson, Senior Assistant Chief Accountant Melissa Walsh, Staff Accountant Jeffrey Kauten, Staff Attorney Matthew Crispino, Staff Attorney Division of Corporation Finance 100 F Street, N.E. Re: 21Vianet Group, Inc. (the “Company”) Form 20-F for the Fiscal Year]

VNET [21Vianet] SC 13G/A: (Original Filing)

[Item 1: Reporting Person - FIL Limited Item 2: (a) [ ] (b) [ ] Item 4: Bermuda Item 5: 21,613,554 Item 6: 0 Item 7: 35,033,982 Item 8: 0 Item 9: 35,033,982 Item 11: 10.021% Item 12: FI Cusip #90138A921 Item 1: Reporting Person - Pandanus Partners, L.P. Item 2: (a) [ ] (b) [ ] Item 4: Delaware]

VNET [21Vianet] SC 13G/A: Item 1: Reporting Person – FIL Limited Item

[Item 1: Reporting Person - FIL Limited Item 2: (a) [ ] (b) [ ] Item 4: Bermuda Item 5: 21,613,554 Item 6: 0 Item 7: 35,033,982 Item 8: 0 Item 9: 35,033,982 Item 11: 10.021% Item 12: FI Cusip #90138A921 Item 1: Reporting Person - Pandanus Partners, L.P. Item 2: (a) [ ] (b) [ ] Item 4: Delaware]

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

[21Vianet Announces Cloud Storage Solutions by StorSimple BEIJING, October 30, 2014 - 21Vianet Group, Inc. (Nasdaq:VNET) (“21Vianet” or the “Company”), the largest carrier-neutral Internet data center services provider in China, today announced that hybrid cloud storage solutions offered by StorSimple, a data storage optimization solution, are now available to all Windows Azure customers in China. StorSimple offers advanced, automatic storage] [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. Shang-Wen Hsiao Chief Financial Officer 6-K 1 d813949d6k.htm FORM 6-K]

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