21Vianet Group, Inc. Commences Construction of One of China's Largest Data Centers

Tue Feb 5, 2013 9:00am EST

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BEIJING, Feb. 5, 2013 (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 the Company has commenced construction of a new data center in the Daxing District
of Beijing.

The new data center, which will be built in two phases contingent on market demand, will be one of
the largest data centers in China as measured by cabinet capacity. It will occupy a gross area of
approximately 42,000 square meters (approximately 452,000 square feet) once fully completed. The
first phase of this data center, which is expected to be fully operational by the end of 2013,
will be capable of hosting more than 3,000 cabinets. At full capacity, the data center will host a
total of over 5,000 cabinets. The data center will be wholly operated and owned by 21Vianet.

Mr. Josh Chen, Founder, Chairman and Chief Executive Officer of the Company, stated, "We are
excited to announce the addition of this mega data center in Beijing, China. We believe this
expanded facility will further bolster 21Vianet's leading market position for hosting and
management network services. In addition, we will also utilize this data center to power
Microsoft's premier commercial cloud services. We remain committed to providing our customers with
the IT Infrastructure services required to grow their businesses and meet today's increasingly
complex and demanding networking requirements."

Mr. Shang Hsiao, President and Chief Financial Officer, stated, "We believe that with our
consistent expansion in data centers and network coverage as well as the rollout of our cloud
platform, we are well-positioned to capture new opportunities to become China's leader in the
rapidly emerging market for cloud computing infrastructure services. At this stage, we do not
expect to raise our current guidance for capital expenditures for the full year of 2013, which
remains contingent upon the finalization of our roll out schedule and financing strategy."

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 1,900 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,
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 and in the attachments 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