SCHEDULE 13G

Under the Securities Exchange Act of 1934

21Vianet Group, Inc.

(Name of Issuer)

Class A Ordinary Shares, par value $0.00001 per share

(Title of Class of Securities)

90138A103

(CUSIP Number)

Zhang Tian China Re Building, No. 11 Jinrong Avenue, Xicheng District Beijing, China 100033 86-10-66577333

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

June 29, 2016

(Date of Event which Requires Filing of this Statement)

   

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
X   Rule 13d-1(b)
☐ Rule 13d-1(c)
☐ Rule 13d-1(d)

^* The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). 

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5.		SOLE VOTING POWER   24,775,794 Class A Ordinary Shares*
	6.		SHARED VOTING POWER   0
	7.		SOLE DISPOSITIVE POWER   24,775,794 Class A Ordinary Shares*
	8.		SHARED DISPOSITIVE POWER   0

(a) Name of Issuer

21Vianet Group, Inc.

(b) Address of Issuer’s Principal Executive

M5, 1 Jiuxianqiao East Road, Chaoyang District, Beijing, 100016, The People's Republic of China. 

Item 2.

(a) Name of Person filing.

(b) Address of Principal Office or, if none, residence.

For each filing person:

Chine Re Building, No 11

Jinrong Avenue, Xicheng District

Beijing, China 100033

(c) Citizenship.

For each filing person:

China

(d) Title and Class of Securities.

Class A Ordinary Shares

(e) CUSIP Number

90138A103

Item 3.  If this statement is filed pursuant to §§240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:

Item 4.  Ownership.

China Property & Casualty Reinsurance Company Ltd. (hereinafter "China Re P&C") and China Life Reinsurance Company Ltd. (hereinafter "China Re Life") are wholly-owned subsidiaries of China Reinsurance (Group) Corporation (hereinafter "China Re"), as such, China Re may be deemed to be the beneficial owner of Class A ordinary shares, represented by American depository shares (each representing six Class A ordinary shares) held by China Re P&C, China Re Life and itself.

China Re may be deemed to have beneficial ownership of 24,775,794 Class A Ordinary Shares, 12,791,400 of which are held by China Re. China Re Life has beneficial ownership of 6,547,200 Class A Ordinary Shares. China Re P&C has beneficial ownership of 5,437,194 Class A Ordinary Shares.

(c)             Number of shares as to which the person has:  

(i)	Sole power to vote or direct the vote
(ii)	Shared power to vote or to direct the vote
(iii)	Sole power to dispose or to direct the disposition of
(iv)	Shared power to dispose or to direct disposition of

 

Item 5.  Ownership of Five Percent or Less of a Class.

Not applicable.

Item 6.  Ownership of More than Five Percent on Behalf of Another Person.

Not applicable.

Item 7.  Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company.

Not applicable.

Item 10.  Certification.

By signing below I certify that, to the best of my knowledge and belief, the foreign regulatory scheme applicable to insurance companies is substantially comparable to the regulatory scheme applicable to the functionally equivalent U.S. institution(s). I also undertake to furnish to the Commission staff, upon request, information that would otherwise be disclosed in a Schedule 13D.

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Exhibit 99.1

Joint Filing Agreement

We, the signatories of the statement to which this Joint Filing Agreement is attached, hereby agree that such statement is filed, and any amendments thereto filed by any or all of us will be filed on behalf of each of us.