Wu Yanxiu is the second son of Cheng Si, Wang Wei, and also the nephew of Wu Zetian. So I left Chang 'an in June. Yan Zhiwei, the general of Bao, and Yang Qizhuang, the general of Wuwei, were also accompanying him. In August, when Wu Yanxiu and his party arrived at Nanting in Montenegro, Moxipu Khan also arrived there. When Mo Siping Khan met him, he knew that he was not a descendant of Li in the Tang Dynasty, so he turned him down contemptuously.

He also said to Yan Zhiwei and others: "My daughter can't marry the nephew of Wuhou, but can only marry the legitimate son of the empress dowager who abolished the usurpation of the orthodox emperor in 703. You brought the nephew of the Wu family today. Isn't he the son of the Emperor? I come from Turkey, and I belong to the Li family. I know that the son of heaven of the Li family is still extinct, and two sons are still alive. Aren't you lying to me? Since you are not sincere, don't blame me for being rude. I will lead all my tribes to invade. "

Ironically, a seven-foot man, Wu Zetian's nephew, went to kiss, not only did he not even see his daughter-in-law's face, but he was also humiliated and detained by Khan.