 The Chinese then defeated the Tibetans, regaining control of the Tarim Basin and the lucrative trade routes to the West, which they held for almost a century before the Tibetans reconquered the region.The Turkish Khagan Ton-ya-bgo (Ch.Ashina Tuizi), chief of the Western Dulu in Dzungaria, visited the Tibetan court in 694. together they attacked and defeated the Chinese at Lengjuan.