[SCHEDULE 13G (Rule 13d-102) 21Vianet Group, Inc. (Name of Issuer) Class A Ordinary Shares, par value US$0.00001 per share (Title of Class of Securities) G91458 102 (CUSIP Number) December 31, 2011 (Date of Event Which Requires Filing of this Statement) ¨ ¨ ý Page 1 of 6 Pages 13G CUSIP No. G91458 102 Page 2 of 6 Pages 1) NAME]
[ANNUAL 13G FOR MACKENZIE ying2011.txt 1 13G]
[SCHEDULE 13G (Rule 13d-102) 21Vianet Group, Inc. (Name of Issuer) Class A Ordinary Shares, par value US$0.00001 per share (Title of Class of Securities) G91458 102 (CUSIP Number) December 31, 2011 (Date of Event Which Requires Filing of this Statement) ¨ ¨ ý Page 1 of 6 Pages 13G CUSIP No. G91458 102 Page 2 of 6 Pages 1) NAME]
[Joint Filing Agreement [Remainder of this page has been left intentionally blank.] 11 Purple Communications Limited Sherman Tuan John Milburn 12 EX-99.(A) 2 d300354dex99a.htm JOINT FILING AGREEMENT] [1 Name Of Reporting Person Purple Communications Limited 2 Check the Appropriate Box if a Member of a Group ¨ ¨ (a) 3 SEC Use Only 4 Citizenship or Place of Organization]
[Joint Filing Agreement [Remainder of this page has been left intentionally blank.] 11 Purple Communications Limited Sherman Tuan John Milburn 12 EX-99.(A) 2 d300354dex99a.htm JOINT FILING AGREEMENT] [1 Name Of Reporting Person Purple Communications Limited 2 Check the Appropriate Box if a Member of a Group ¨ ¨ (a) 3 SEC Use Only 4 Citizenship or Place of Organization]
[filing.txt 1 13G]
[CUSIP No. 74734M109 13G]
[Joint Filing Agreement [Remainder of this page has been left intentionally blank.] 12 Sheng Chen Sheng Chen Fast Horse Technology Limited Sunrise Corporate Holding Ltd.] [1 Name Of Reporting Person Sheng Chen 2 Check the Appropriate Box if a Member of a Group ¨ ¨ (a) 3 SEC Use Only 4 Citizenship or Place of Organization]
[AGREEMENT Dated: February 14, 2012 Ceyuan Ventures I, L.P. Its: General Partner Ceyuan Ventures I, L.P. Ceyuan Ventures Advisors Fund, LLC Its: Class B Shareholder Ceyuan Ventures Advisors Fund, LLC Ceyuan Ventures Management, LLC]
[CUSIP No. 74734M109 13G]
