Chang Qi 昌奇

In Chapter 67 of the Romance, when Cao Cao divided his army into three and set out on a western campaign, Zhang Lu, following the advice of his younger brother Zhang Wei that the most perilous place in Hanzhong was Yangping Pass, sent his senior generals Yang Ang and Yang Ren together with Zhang Wei. That night Yang Ang and Yang Ren raided the camp of Xiahou Yuan and Zhang He, whose men were exhausted and resting, along two routes and badly defeated Cao Cao's troops; the next day they again fell upon Cao Cao along two routes when he came out to inspect Zhang Wei's camp with only Xu Chu and Xu Huang, but unable to withstand Xu Chu's valor, they withdrew. Romance, Ch. 67 §1–5

When the two sides had faced each other for more than fifty days, Cao Cao, under the pretext of withdrawing his army, gave Xiahou Yuan and Zhang He 3,000 light cavalry each and had them go around behind Yangping Pass by a byway. Yang Ang ignored Yang Ren's earnest plea not to pursue, since Cao Cao was full of crafty schemes, and went out leading all the troops and horses of the five camps. Xiahou Yuan's troops, having lost their way in a thick fog, entered Yang Ang's empty camp and set it on fire; Yang Ren cut his way out along the main road and fled to Nanzheng, and Yang Ang was killed by Zhang He. Zhang Wei too abandoned the pass in the middle of the night and fled, and Cao Cao took Yangping Pass and the camps. Romance, Ch. 67 §6–11

When Zhang Lu, in a great rage, was about to behead Yang Ren, Yang Ren said that he had advised Yang Ang not to pursue Cao Cao's troops but Yang Ang had not listened, which was why they had been defeated; he asked for another body of troops to go out again, promising that he would surely behead Cao Cao and would willingly accept military law if he did not win. Zhang Lu took his written military pledge, and Yang Ren led 20,000 troops out of Nanzheng and made camp. Romance, Ch. 67 §12

Preparing to advance his army, Cao Cao first had Xiahou Yuan take 5,000 troops to scout the road to Nanzheng, and Xiahou Yuan ran straight into Yang Ren's troops and horses, and the two armies drew up in battle array. Yang Ren sent out his subordinate general Chang Qi to fight Xiahou Yuan, but in fewer than three bouts Chang Qi was cut down from his horse by a single stroke of Xiahou Yuan's blade. Yang Ren rode out himself with his spear levelled and fought Xiahou Yuan for more than thirty bouts without either gaining the upper hand; pursuing Xiahou Yuan, who feigned defeat and fled, he fell for the trick of the trailing blade and was cut down. Cao Cao then advanced his army straight to Nanzheng and made camp. Romance, Ch. 67 §13–14