(now Chamdo), "Fuguo " in Ganzi, "Fanlu " in Litang, and Tuyuhun in Qinghai. Songtsen Gampo also led a large army to attack Zhangzhung in 642. It took him three years to conquer Zhangzhung and sent Khyungpo Pungse Sutse as the governor of Zhangzhung. Zhangzhung then became a vassal state of the Tibetan Empire.