Introduction to "Water Margin": "Water Margin", also known as "Water Margin of Loyalty", generally referred to as "Water Margin", was written in the late Yuan and early Ming dynasties. It is one of the four famous works in China and was written by Shi Naian , compiled by Luo Guanzhong. The work takes the uprising led by Song Jiang as the main theme. Through a series of vivid stories of Liangshan heroes resisting oppression and heroic struggle, it reveals the social contradictions at that time, exposes the decadence and brutality of the ruling class in the late Northern Song Dynasty, and exposes the sharply opposed society at that time. Contradictions and the cruel reality of "officials forcing the people to rebel". It is one of the most epic works in Chinese literature. It is also the first chapter novel written in vernacular in Chinese history, setting a precedent for chapter novels in vernacular.