Dai Zong passes by Liangshan and is drugged in an inn of the stronghold run by Zhu Gui. Zhu discovers Cai Jiu's letter on Dai and takes him to the bandit chiefs, who learn from Dai the plight of Song Jiang. Wu Yong suggests fooling Cai Jiu to send Song to Dongjing, so that the bandits could rescue him when he is on the way. To forge a letter from Cai Jing requires the help of the scholar Xiao Rang, who could imitate the Grand Tutor's handwriting, and the craftsman Jin Dajian, who could replicate Cai's personal seal. Dai Zong travels to the homes of the two men, who are told their skills are needed for the renovation of a temple. They are lured to the vicinity of Liangshan and taken to the stronghold. Finding themselves trapped, Jin and Xiao have no choice but join Liangshan. They create the fake letter as instructed by Wu Yong.