Li Xin (; died 420), courtesy name Shiye (), nickname Tongzhui (), was a duke of the Chinese state Western Liang. He succeeded his father Li Gao (Prince Wuzhao) in 417 and aggressively tried to pursue campaigns against rival Northern Liang's prince Juqu Mengxun, but fell into a trap set by Juqu Mengxun in 420 and was killed in battle, bringing destruction to his state (although his brother Li Xun tried to hold out but was defeated soon as well). During Li Gao's reign It is not known when Li Xin was born, or whether his mother Lady Yin was his father Li Gao's wife or concubine. He was Li Gao's second son, and so after Li Gao declared independence from Northern Liang and founded Western Liang in 400, it was not he, but his older brother Li Tan (), who was created heir apparent. The first historical reference to him was in 404, when Li Tan died, and Li Gao created him heir apparent to replace Li Tan. 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 (). In 417, Li Gao grew ill, and after entrusting Li Xin to his own half-brother Song Yao () -- telling him that Li Xin was now his son—died. Li Xin succeeded him as duke, and Lady Yin was honored as princess dowager. Reign Li Xin made his uncle Song Yao the prime minister, but meanwhile carried out cruel punishments and favored palace construction projects, both of which made the people feel burdened. He also made plans to attack Northern Liang, further burdening his state. 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