In his first encounter with Liangshan, Huyan is shaken by the capture of Peng Qi, one of his two lieutenants, by the bandits. But he gains the upper hand with his cavalry consisting of groups of chain-linked armoured horses, which charge forward in unison. Overwhelmed, the outlaws have to hole up in their stronghold with the marsh as the buffer as they ponder how to counterattack . Unable to cross the waters, Huyan writes to request the court to send Ling Zhen, who could assail the bandits with cannons. Ling arrives and shells the stronghold, with some cannons hitting the shores beyond the marsh, shocking the outlaws.