《宋史·列传·卷一百二十三》
韩世忠派人招降，曹成领众投降，得战士八万，韩世忠将他们发送到行在。
世忠遣人招之，成以其众降，得战士八万，遣诣行在。
Han Shizhong sent someone to call for Cao’s surrender. Cao Cheng led his followers to surrender, bringing with him eighty thousand soldiers, whom Han Shizhong send to the capital.