[21Vianet Group, Inc. to Invest in Aipu BEIJING, June 4, 2014 – 21Vianet Group, Inc. (NASDAQ: VNET) (“21Vianet” or the “Company”), the largest carrier-neutral Internet data center services provider in China, today announced that the Company and its affiliate have entered into definitive agreements to invest in Sichuan Aipu Network Co., Ltd. and its affiliates (collectively, the “Aipu Group”). Headquartered] [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 d741537d6k.htm FORM 6-K]

[21Vianet Group, Inc. Appoints New Independent Director BEIJING, June 10, 2014 – 21Vianet Group, Inc. (NASDAQ: VNET) (“21Vianet” or the “Company”), the largest carrier-neutral Internet data center services provider in China, today announced that its Board of Directors (the “Board”) has appointed Dr. Eden Y. Woon as an Independent Director, effective immediately. Dr. Eden Y. Woon is currently Vice-President for] [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 d741539d6k.htm FORM 6-K]