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In 211, Lü Dai, with Yin Yi () as his deputy, led 2,000 troops west to lure Zhang Lu, a warlord based in Hanzhong Commandery, into a trap at Hanxing Commandery (漢興郡; around present-day Baoji, Shaanxi). However, Zhang Lu suspected something fishy so he did not respond. Sun Quan then ordered Lü Dai and his men to return to Jiangdong.