Qilian Mountains
Tuyuhun (; LHC: *"tʰɑʔ-jok-guənʔ"; Wade-Giles: "T'u-yühun"), also known as Azha (Tibetan: "‘A-zha"), was a dynastic kingdom established by the nomadic peoples related to the Xianbei in the Qilian Mountains and upper Yellow River valley, in modern Qinghai, China.