Bairi Tibetan Autonomous County, also known as Tianzhu from its Chinese name, is in the prefecture-level city of Wuwei in the central part of Gansu province, China, bordering Qinghai province to the south and west. It has an area of 7,147 km2 (2,759 sq mi) and approximately 230,000 inhabitants (2003). Its administrative seat is Rabgyai Town (Huazangsi).