21Vianet Group, Inc. Files Annual Report on Form 20-F

BEIJING, April 19, 2012 (GLOBE NEWSWIRE) -- 21Vianet Group, Inc. (Nasdaq:VNET) ("21Vianet" or the "Company"), the largest carrier-neutral Internet data center services provider in China, today announced that it filed its annual report on Form 20-F for the fiscal year ended December 31, 2011 with the Securities and Exchange Commission on April 18, 2012. The annual report can be accessed on 21Vianet's investor relations website at http://ir.21vianet.com/. The Company will provide a hard copy of the annual report containing its audited consolidated financial statements, free of charge, to its shareholders and ADS holders upon request.

About 21Vianet

21Vianet Group, Inc. is the largest carrier-neutral Internet data center services provider in China. 21Vianet provides hosting and related services, managed network services and cloud computing infrastructure services, improving the reliability, security and speed of its customers' Internet connections through 21Vianet's Internet infrastructure. Customers may locate their servers and networking equipment in 21Vianet's data centers and connect to China's Internet backbone through 21Vianet's extensive fiber optic network. In addition, 21Vianet's proprietary smart routing technology, BroadEx, enables customers' data to be delivered across the Internet in a faster and more reliable manner. 21Vianet operates in 33 cities throughout China, servicing a diversified and loyal base of more than 1,500 customers that span many industries ranging from Internet companies to government entities and blue-chip enterprises to small- to mid-sized enterprises.

CONTACT: Investor Relations Contact:

         ICR, Inc.Jeremy Peruski

         +1 (646) 405-4922

         IR@21Vianet.com
Source: 21Vianet

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