Water Margin is a novel attributed to Shi Nai'an. Considered one of the Four Great Classical Novels of Chinese literature, the novel is written in vernacular Chinese rather than Classical Chinese. The story, set in the Song dynasty, tells of how a group of 108 outlaws gathers at Mount Liang (or Liangshan Marsh) to form a sizable army before they are eventually granted amnesty by the government and sent on campaigns to resist foreign invaders and suppress rebel forces. It has introduced to readers many of the best-known characters in Chinese literature, such as Wu Song, Lin Chong and Lu Zhishen.