 After Guo's army collapsed, Xue was himself attacked by the Tibetan prime minister Gar Trinring Tsendro ("Lun Qinling" () in Chinese) and defeated at the Dafeichuan.Nearly the entire army was lost, and Xue was forced to sue for peace under unfavorable terms.Emperor Gaozong sent the official Le Yanwei to the front to put Xue, Guo, and Ashina under arrest, but released them once they were brought back to the capital Chang'an.