Ticker: VNET, Company: 21Vianet Group, Inc., Type: FWP, Date: 2011-04-20
Original SEC Filing: Click here

---

Webplus: VNET/20110420/FWP/1/000.htm SEC Original: dfwp.htm
Issuer Free Writing Prospectus Registration No. 333-173292 April 20, 2011 21VIANET GROUP, INC. http://www.sec.gov/Archives/edgar/data/1508475/000119312511103118/df1a.htm On April 6, 2011, the Company filed Amendment No. 1 to its registration statement on Form F-1, including a preliminary prospectus, or the Preliminary Prospectus. This free writing prospectus reflects the following amendments that were made to the Preliminary Prospectus dated April 6, 2011. References to

---

Company Information:

Ticker: VNET, Company: 21Vianet Group, Inc., Type: FWP, Date: 2011-04-20CIK: 0001508475, Location: F4, SIC: 7370, SIC Desc: SERVICES-COMPUTER PROGRAMMING, DATA PROCESSING, ETC.
Business Phone & Address:
M5, 1JIUXIANQIAO EAST ROAD
Beijing 100016