燕青
Midway in the campaign against Fang La, Chai Jin and Yan Qing travel to Fang's base in Qingxi County (清溪縣; present-day Chun'an County, Zhejiang) in the guise of merchants in a plan to infiltrate his rebel force. Chai Jin, using the false name "Ke Yin" (), is brought before Fang, who is charmed by his looks and eloquence. He even marries his daughter to him. When Fang fights his last-ditch battle with Liangshan, Chai Jin suddenly sets upon his force. Fang La‘s side is thrown into disarray, leading to his capture. Chai's wife hangs herself.