In the battle of Muzhou (睦州; in present-day Hangzhou, Zhejiang) in the campaign against the rebel leader Fang La, Wu Song fights Fang‘s sorcerer Bao Daoyi. Using his magic power, Bao manoeuvres a flying sword to slice off Wu Song's left arm. Wu is saved by Lu Zhishen. Wu is one of the few Liangshan heroes who survive the run of campaigns. Not wanting to serve the government, he refuses to go back to Dongjing and chooses to stay in Hangzhou to look after the stroke-stricken Lin Chong. He lives as a Buddhist recluse in the Liuhe Pagoda until the age of 80.