VNET [21Vianet] SC 13G: (Name of Issuer) Common Stock (Title of Class
[(Name of Issuer) Common Stock (Title of Class of Securities) (CUSIP Number) December 31, 2014 (Date of Event Which Requires Filing of this Statement) [X] Rule 13d-1(b) [ ] Rule 13d-1(c) [ ] Rule 13d-1(d) * CUSIP No. 1. NAMES OF REPORTING PERSONS 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP 3. SEC USE ONLY 4. CITIZENSHIP]