During Emperor Zhongzong's Second Reign
Wu Zetian was overthrown in a coup in 705, and her son and crown prince Li Xian, a former emperor, returned to the throne (as Emperor Zhongzong). Sometime thereafter, Guo was made the Protectorate General to Pacify the West. In 706, he went to the Tuqishi (突騎施) tribe to meet with its chieftain Wuzhile (烏質勒) to discuss military matters. They met outside Wuzhile's tent, and It was cold and snowing at the time, but Guo did not move. Wuzhile, however, was old and could not stand the cold; he died shortly after the meeting. Wuzhile's son Suoge (娑葛), believing that Guo's acts were deliberate, gathered his troops and got ready to attack Guo. Guo's deputy Jie Wan (解琬) became aware of this and suggested that they flee. Guo declined—stating that he felt that he needed to show sincerity, and that given that they were deep in Tuqishi territory, they could not get away anyway. The next day, he went to mourn Wuzhile, and showed sincere emotions in doing so. Suoge was touched and made peace with him.
Meanwhile, Wuzhile's subordinate Juechuo Zhongjie (闕啜忠節) was unwilling to submit to Suoge. Juechuo was, however, unable to prevail over Suoge, and in 708, at Guo's suggestion, he was set to give up his forces and go to the Tang capital Chang'an, when the Tang general Zhou Yiti (周以悌) suggested to him the idea of bribing the chancellors Zong Chuke and Ji Chuna to launch an attack against Suoge. Juechuo did so, and Zong, after Juechuo's bribery, proposed to Emperor Zhongzong the idea of attacking Suoge in alliance with Tufan, which Emperor Zhongzong agreed despite Guo's opposition. Suoge heard of this plan and acted first, successfully attacking several Tang outposts and then sending an envoy to Chang'an to demand that Zong be executed. Subsequently, Guo reported the facts of the situation to Emperor Zhongzong, which led to Zong's accusing him of treason. However, Emperor Zhongzong agreed with Guo and sent a peace envoy to make peace with Suoge and creating him Shisixing Khan.
Read more about this topic: Guo Yuanzhen