Yang Feng, a former White Wave bandit, led his troops to fight Li Jue and Guo Si in an attempt to defend the emperor, but lost the battle.
Li Jue and Guo Si quickly returned with more troops and defeated Yang Feng and killed several officials who fled with Emperor Xian.
In anger, Yuan Shu ordered his general Zhang Xun (張勳), with Yang Feng and Han Xian as his subordinates, to lead troops to attack Lü Bu.
Lü Bu heeded Chen Gui's suggestion and managed to induce Yang Feng and Han Xian to turn against Yuan Shu.
Yang Feng and Han Xian then joined Lü Bu in attacking Yuan Shu's forces, led by Zhang Xun, and defeated the enemy.