21Vianet Group, Inc. Completes Acquisition of Managed Network Entities

BEIJING, Dec. 15, 2011 (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 has exercised its option to acquire the remaining 49% equity interest in two companies that provide managed network services, Zhiboxintong (Beijing) Network Technology Co., Ltd. and Beijing Chengyishidai Network Technology Co., Ltd. (together, the "Managed Network Entities"). In September 2010, the Company acquired 51% equity interest in the Management Network Entities with an option to acquire the remaining 49% equity interest before December 31, 2011.

Mr. Josh Chen, Founder, Chairman and Chief Executive Officer of the Company, stated, "We remain committed to further expanding our managed network services to meet our growing customer demand. We are confident that the completion of this acquisition will enable us to further integrate the Managed Network Entities' extensive network and business operations, streamlining expenses and solidifying our industry leadership."

Mr. Shang Hsiao, President and Chief Financial Officer of the Company, commented, "Going forward, we continue to believe that the full acquisition of the Managed Network Entities will further enhance the revenue growth and profitability of our business in the coming years due to increasing demand for managed network services. This acquisition is not expected to have any material impact on our announced guidance for the fourth quarter of 2011."

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 1,400 customers that span many industries ranging from Internet companies to government entities and blue-chip enterprises to small- to mid-sized enterprises.

Safe Harbor Statement

This announcement contains forward-looking statements. These forward-looking statements are made under the "safe harbor" provisions of the U.S. Private Securities Litigation Reform Act of 1995. These statements can be identified by terminology such as "will," "expects," "anticipates," "future," "intends," "plans," "believes," "estimates" and similar statements. Among other things, the outlook for the fourth quarter of 2011 and quotations from management in this announcement, as well as 21Vianet's strategic and operational plans, contain forward-looking statements. 21Vianet may also make written or oral forward-looking statements in its reports filed with, or furnished to, the U.S. Securities and Exchange Commission, in its annual reports to shareholders, in press releases and other written materials and in oral statements made by its officers, directors or employees to third parties. Statements that are not historical facts, including statements about 21Vianet's beliefs and expectations, are forward-looking statements. Forward-looking statements involve inherent risks and uncertainties. A number of factors could cause actual results to differ materially from those contained in any forward-looking statement, including but not limited to the following: 21Vianet's goals and strategies; 21Vianet's expansion plans; the expected growth of the data center services market; expectations regarding demand for, and market acceptance of, 21Vianet's services; 21Vianet's expectations regarding keeping and strengthening its relationships with customers; 21Vianet's plans to invest in research and development to enhance its solution and service offerings; and general economic and business conditions in the regions where 21Vianet provides solutions and services. Further information regarding these and other risks is included in 21Vianet's reports filed with, or furnished to the Securities and Exchange Commission. 21Vianet does not undertake any obligation to update any forward-looking statement, except as required under applicable law. All information provided in this press release is as of the date of this press release, and 21Vianet undertakes no duty to update such information, except as required under applicable law.

CONTACT: Investor Relations Contact:

         ICR, Inc.Jeremy Peruski

         +1 (646) 405-4922

         IR@21Vianet.com
Source: 21Vianet

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