[] [Our ref DLK/653749-000001/7131156v1 21Vianet Group, Inc. M5, 1 Jiuxianqiao East Road Chaoyang District Beijing, 100016 People’s Republic of China 18 July 2014 Dear Sirs 21Vianet Group, Inc. Company Registration Statement Act Shares Plan We have been asked to render this opinion in our capacity as counsel as to Cayman Islands law to 21Vianet Group, Inc. (the “ We have reviewed] [21Vianet Group, Inc. 2014 SHARE INCENTIVE PLAN ARTICLE 1 PURPOSE Plan Company The purpose of the 21Vianet Group, Inc. Share Incentive Plan (the “ ARTICLE 2 DEFINITIONS AND CONSTRUCTION Wherever the following terms are used in the Plan, they shall have the meanings specified below unless the context clearly indicates otherwise. The singular pronoun shall include the plural where the] [Consent of Independent Registered Public Accounting Firm Shanghai, People’s Republic of China July 18, 2014 EX-23.1 4 d745816dex231.htm EX-23.1]