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. In 418, Juqu Mengxun attacked Western Liang again, and Li Xin was preparing to meet him in battle. His official Zhang Tishun () persuaded him against it, however, and instead he stayed in his capital Jiuquan (酒泉, in modern Jiuquan, Gansu), and Juqu Mengxun, not willing to siege the city, withdrew. Later that year, because he had previously sent messengers to Jin, offering to be a vassal, Jin created him the Duke of Jiuquan. In 419, with Li Xin's punishments and construction projects overburdening his people, his officials Zhang Xian () and Fan Cheng () advised him to be more lenient and more thrifty, pointing out that he would otherwise not be able to defeat Juqu Mengxun. Li Xin ignored their advice. In 420, Juqu Mengxun set another trap for Li Xin. He pretended to attack Western Qin's city Haomen (浩亹, in modern Haidong Prefecture, Qinghai), but once reaching Haomen, immediately withdrew and hid his army at Chuanyan (川巖, near Zhangye). Li Xin, believing wrongly that Juqu Mengxun's defenses were down, decided to attack Zhangye, against the advice of Song Yao and Zhang Tishun. Princess Dowager Yin also spoke against it, pointing out that he had insufficient strength to conquer Northern Liang and warning him that a defeat would destroy his state. He ignored them, but as they had predicted, as he approached Zhangye, Juqu Mengxun intercepted him and defeated him. His generals then advised him to quickly withdraw to Jiuquan, but Li Xin, stating that he had disobeyed his mother and would only be able to see her again after a victory, engaged Juqu Mengxun again, suffering an even greater defeat, and he was killed in battle. Juqu Mengxun quickly captured Jiuquan, and by 421 would take over the rest of Western Liang territory. Personal information Father Li Gao (Prince Wuzhao) Mother Lady Yin Children Li Zhong'er (), the heir apparent, later official under Liu Song and Northern Wei, whose descendant Li Yuan would become the house of Tang emperors. References Western Liang (Sixteen Kingdoms) dukes 420 deaths Jin dynasty (266–420) politicians Generals from Gansu Year of birth unknown Politicians from Gansu