The remaining Xueyantuo people briefly supported Yi'nan's nephew Duomozhi as Yitewushi Khan to try to revive Xueyantuo, but neither Tang nor the Chile tribes welcomed this development, and Emperor Taizong sent Li Shiji with an army toward Duomozhi's location—with the instruction to accept Duomozhi's surrender if he wanted to surrender, and to attack if Duomozhi did not. Li Shiji soon arrived at the Khangai, and Duomozhi's assistant Tizhen () surrendered. Duomozhi fled to the south into the canyon. Li Shiji sent his subordinate Xiao Siye () to comfort him, and he surrendered to Xiao. Not all of his subordinates were willing to surrender, however, and Li Shiji attacked them, killing and capturing many of them. Duomozhi was taken to the Tang capital Chang'an and made a Tang general, and Xueyantuo was at its end.