Cao Hong
In 218, Zhang Fei and Ma Chao's army garrisoned at Gushan (), where they spread news that they were going to blockade the enemy's retreat route. Cao Hong wanted to attack Wu Lan at Xiabian County, but the other officers were suspicious of Zhang Fei's movements. Cao Xiu thought that if Zhang Fei was really planning to seal their retreat route, he should keep his plan covert; now that Zhang Fei had overtly revealed his intention, they should make use of the opportunity to feign retreat and perform a frontal assault. Cao Hong agreed to Cao Xiu's tactic and attacked. Lei Tong and Ren Kui were killed in battle, while Wu Lan fled to join the Di tribes, where he was subsequently killed by a Di leader, Qiangduan. After such a defeat, Zhang Fei and Ma Chao withdrew their army by around April 218.