張彥
After leaving Yuan Shu, Lü Bu then headed to northern China to join Yuan Shu's relative, Yuan Shao. He assisted Yuan Shao in attacking Zhang Yan at Changshan. Zhang Yan had thousands of elite soldiers and cavalry. Lü Bu led his subordinates Cheng Lian (成廉) and Wei Yue (魏越) and dozens of riders to raid Zhang Yan's camp, killing several enemies and then fighting their way out. They did this three to four times every day continuously for a period of over ten days and eventually defeated Zhang Yan's forces.