Luo Ben (c. 1330–1400), better known by his style name Luo Guanzhong (罗贯中) (Mandarin pronunciation: [lwɔ kwantʂʊŋ]), was a Chinese writer who lived during the Yuan Dynasty. He was also known by his pseudonym Huhai Sanren (Chinese: 湖海散人; pinyin: Húhǎi Sǎnrén; literally "Leisure Man of Lakes and Seas"). Luo was attributed with writing Romance of the Three Kingdoms and editing Water Margin, two of the Four Great Classical Novels of Chinese literature.