Juqu Mengxun
In 410, Li Xin fought a battle with the Northern Liang prince Juqu Mengxun when Juqu Mengxun attacked Western Liang, but was defeated by Juqu Mengxun, and his general Zhu Yuanhu () was captured, forcing Li Gao to use gold and silver to ransom Zhu. In 411, he returned the favor, as after Juqu Mengxun made another attack on Western Liang but was forced to withdraw after his food supplies ran out, Li Xin attacked the Northern Liang army and dealt Juqu Mengxun a defeat, capturing Juqu Mengxun's general Juqu Bainian ().