He was granted title To shad and appanage of Tiele and Xueyantuo tribes in northern part of Gobi Desert when he was already 11.
His deputy commanders were Qibi Heli (a Tiele chieftain who had also become a Tang general) and Guo Xiaoke.
In retribution for the death of Guo Xiaoke, Ashina She'er ordered the execution of eleven thousand Kuchean inhabitants by decapitation.
It was recorded that "he destroyed five great towns and with them many myriads of men and women... the lands of the west were seized with terror.
"[2] After Kucha's defeat, Ashina dispatched a small force of light cavalry led by the lieutenant Xue Wanbei to Khotan, ruled by the king Yuchi Fushexin.