Sun Li used to be a garrison major in Dengzhou. He is highly skilled in martial arts and archery and uses a variety of weapons in combat. He is impatient by nature and is often likened to Yuchi Gong. However, he has a paler complexion and is thus nicknamed "Sick Yuchi". Sun Li is one of the scouting generals of the Liangshan cavalry. After the victory over Fang La, the emperor reinstates him as a garrison major in Dengzhou in recognition of his contributions.