Song Wan, along with Wang Lun and Du Qian were the pioneers of the stronghold on Liangshan. Once, Lin Chong fled to Chai Jin's residence after killing Lu Qian and his men, and abandoned the burnt storage field. Chai Jin wrote a letter to Wang Lun, recommending Lin Chong to join the Liangshan band. However, the narrow-hearted and jealous Wang Lun refused to allow Lin Chong to join, and tried to send Lin away with gifts. In the end, after constant persuading from Song Wan, Du Qian and Zhu Gui, Wang agreed to let Lin join the band, only if Lin fulfills the traditional requirement in joining Liangshan; Lin has to kill a person and present the head to the chief within three days.