《资治通鉴·汉纪·汉纪五十一》
于是，曹操率军向西进发，准备攻占成，张邈拨出部分军队，派部将卫兹率领，随曹操一同进军。
遂引兵西，将据成皋，张邈遣将卫兹分兵随之。
Thereupon, Cao Cao led the army west to prepare to seize Cheng, and Zhang Miao dispatched a portion of his army and sent his military commander Wei Zi to lead it and advance with Cao Cao.