Sun Art Retail Group Limited, an investment holding company, operates brick-and-mortar stores and online sales channels in the People's Republic of China. It operates hypermarkets, superstores, and mini stores under RT-Mart, RT-Super, and RT-Mini names. As of March 31, 2021, it had a total of 490 hypermarkets, six superstores, and 32 mini stores. The company also provides consulting, investment, wholesaling, and retailing services. The company was founded in 1998 and is based in Wan Chai, Hong Kong.