In 632, Ashina Dieli, who had lost the support of his people due to his cruel rule, lost a campaign against the Khazars, which caused the tribes Shebeidaguan () and Nushibi who had formerly supported him to rebel and force him to flee to Kangju. Bereft of a leader, the Turks chose Ashina Nishu as Duolu Khan, and Ashina Nishu nominally submitted to the Tang dynasty and received Tang titles. The enmity continued, however, even after Nishu died and was succeeded by his brother, Ashina Tong'e.