He was also present as the head of delegation to Chang'an in marriage ceremony for qaghan and Princess Xian'an (咸安公主) in 788.
He commanded the Uyghur army against Tibetans who were aided by Karluk Yabgu State ruler Alp Burguchan[4] who united Chigils, Bulaqs and Shatuo, near Beshbaliq in 790.
He didn't change his surname to original one but kept Yaglakar name, nevertheless he exiled all of remaining princes from cadet branches to Chang'an.
[7] According to Colin Mackerras and Takao Moriyasu, he did not have any relations with China until 805 and this led Chinese historians to believe that khagan died in 805.
His reign saw territorial expansion of the khaganate, subjugation of Yenisei Kyrgyz, defeat of Karluk Yabgu State and Tibetan Empire in Tarim Basin, conquest of Beshbaliq in 790, Karashar and Kucha in 798.