He was a swordsman who helped kill someone in his early life. To hide his identity, he hid his face with chalk and let his hair grow out. He would give up his life as a swordsman to become a scholar after nearly being executed.
He would serve under Liu Bei but then Cao Cao would take him in his kingdom, though Xu Shu vowed never to advise him.
Character: humble, hard-working, devoted to his cause