 Between 748 and 752, the king of the White Mywa, who formed part of 'Jang (Nanzhao) rebelled against Chinese rule and submitted to the king of Tibet.In 751 The Tibetans again sent troops north of the Jaxartes River (Syr Darya) and helped the Arabs and Qarluq Turks defeat the Chinese at Talas.this decisive battle ended Tang power in the west.