History of the Amdo Tibetan Mgar-rtse tribe, particularly the Gya-sa tsho ba, now based in ʼBaʼ Thun-te (Ch. Tongde Xian), Hainan Prefecture, Qinghai Province. Includes genealogies of seven families (khyim rgyud), as well as information on the group's early history in Repkong (Ch. Tongren Xian), other Mgar-rtse tsho ba, and their traditional dpon lineages. Compiled on the basis of extensive interviews with local elders, as well as historical documents.