Alibaba Group, China’s top e-commerce group, will establish its fourth base in China with an investment of $100 million in the southwestern city of Chengdu, the Chengdu city government said.

Chengdu, the provincial capital of Sichuan, will join Beijing, Shanghai and Guangzhou as bases for Alibaba Group, which includes Alibaba.com (1688.HK), the city government said in a statement.

The new facility will serve as a research and development base, call centre, back office operation and maintenance, disaster-prevention backup, and training facility, it said.

The new base will be set up in Chengdu’s Hi-tech Industrial Development Zone and employ more than 10,000 people.