Plot: When the reinforced Yuan cavalry approached Wu Chao, the left and right reported to Cao Cao to divide their troops to resist, Cao Cao was furious and said, "Tell me again only when the enemy soldiers have reached my back!" So the soldiers all fought to the death and defeated the defenders of Wu Chao and captured Yuan general Chun Yu Qiong. The two generals, Zhang He Semi and Gao Lan, who were attacking Cao's camp, heard that Chun Yu Qiong had been defeated and that Yuan Shao was suspicious of them, so they surrendered to Cao Cao at the front of the battle