21Vianet Group, Inc. to Announce Fourth Quarter and Full Year 2018 Financial Results

21Vianet Group, Inc. (Nasdaq: VNET) ("21Vianet" or the "Company"), a leading carrier- and cloud-neutral Internet data center services provider in China, today announced that it plans to release its fourth quarter and full year 2018 financial results on Monday, March 4, 2019 after the market closes. The Company will hold a conference call at 8:00 P.M. on Monday, March 4, 2019 U.S. Eastern Time, or 9:00 A.M. on Tuesday, March 5, 2019 Beijing Time, to discuss the financial results.

Participants may access the call by dialing the following numbers:

United States Toll Free:	[phone]
International:	[phone]
China Domestic:	400-120-0654
Hong Kong:	[phone]
Conference ID:	8385847

The replay will be accessible through March 12, 2019 by dialing the following numbers:

United States Toll Free:	[phone]
International:	[phone]
Conference ID:	8385847

A live and archived webcast of the conference call will be available through the Company's investor relation website at http://ir.21vianet.com.

About 21Vianet

21Vianet Group, Inc. is a leading carrier- and cloud-neutral Internet data center services provider in China. 21Vianet provides hosting and related services, including IDC services, cloud services, and business VPN services to improve the reliability, security and speed of its customers' Internet infrastructure. Customers may locate their servers and equipment in 21Vianet's data centers and connect to China's Internet backbone through 21Vianet's extensive fiber optic network. 21Vianet operates in more than 30 cities throughout China, servicing a diversified and loyal base of nearly 5,000 hosting and related enterprise customers that span numerous industries ranging from Internet companies to government entities and blue-chip enterprises to small- to mid-sized enterprises.

Investor Relations Contacts:

21Vianet Group, Inc.Rene Jiang+86 10 8456 [e-mail]

Julia Jiang+86 10 8456 [e-mail]

ICR, Inc.Jack Wang+1 (646) [e-mail]