 When they made exploratory attacks, Chen repelled each one.Erzhu Rong was so frustrated that he considered withdrawing, but after suggestions by the officials Yang Kan (楊侃) and Gao Daomu (高道穆) that doing so would only allow Yuan Hao to be entrenched, he prepared a surprise attack at night, crossing the Yellow River and capturing Yuan Hao's son Yuan Guanshou.Yuan Hao's forces subsequently collapsed, and Yuan Hao fled with his guards.