Emperor Xuanzong of Tang
In 720 Emperor Xuanzong of Tang attacked but Tonyukuk defeated his Basmyl cavalry and the Turks pushed into Gansu. Next year Xuanzong bought him off. In 727 he received 100,000 pieces of silk in return for a 'tribute' of 30 horses. He refused to ally with Tibet against China. His wisdom was praised by Zhang Yue (Tang dynasty).