In Beijing, you can find a lot of supermarkets, such as Wal-mart Supercenter,Watsons, and Carrefour. Besides these mainstays, Lotus Supercenter and Century Mart are excellent one too.

Lotus Supercenter
Chinese name: 易初莲花(yì chū lián huā)
Lotus Supercenter (Wudaokou Branch)
Location: 1/F, Dongsheng Mansion, No.8,ZhongguancunDong Lu, Haidian District
Lotus Supercenter (Chaoyanglu Branch)
Location: No.176, Tianping Zhuang, Chaoyang Lu, Chaoyang District
Lotus Supercenter (Liuliqiao Branch)
Location: No.10, South 3rd West Ring Road, Fengtai District
Lotus Supercenter (Jinyuan Branch)
Location: B1, Century Jinyuan, No.1, Yuanda Lu, Haidian District
Lotus Supercenter (Beiyuan Branch)
Location: No.42, Beiyuan Lu, Chaoyang District
Century Mart
Chinese name: 世纪联华(shì jì lián huá)
Location: Bldg1, Guangqumenwai Dajie, Chaoyang District (west of Shuangjingqiao)
Century Mart (Changping Branch)
Location: No.21, Nanhuan Zhonglu, Changping District
Century Mart (Miyun Branch)
Opening Hours: 8:30 - 21:30
Location: No.1, Guoyuan Lu, Miyun County
Bus Routes: 3, 12, 8, 10, 2, 5, 7, 980, 987 (get off at Yunguang Huandao Stop)