Juqu Mengxun
Later in 417, Juqu Mengxun tried to trick Li Xin by having his governor of Zhangye Commandery (張掖, roughly modern Zhangye, Gansu), Juqu Guangzong () pretend to surrender to Li Xin. Li Xin, as requested by Juqu Guangzong, mobilized forces to try to relieve Juqu Guangzong at Zhangye, and Juqu Mengxun waited to ready to ambush Li Xin. However, on the way to Zhangye, Li Xin realized that there was a trap, and he withdrew. Juqu Mengxun tried to attack him, but he defeated Juqu Mengxun.