In 198 AD, solidarity LUI Bo Yang, Cao Cao took the opportunity to reach out to Hanoi to win the publicity will kill Chou Yang Yang Cao Cao attached to Hanoi.

• 公元198年，张扬声援吕布，曹操借机把手伸向河内，收买张扬部将扬丑杀张扬以河内附曹操。