Li Ruzhen (Chinese: 李汝珍) (c.1763 - 1830), courtesy name: Songshi (松石), was a Chinese novelist and phonologist of the Qing Dynasty. A native of Beijing, he is the author of the novel Jing Hua Yuan (鏡花緣), or Flowers in the Mirror. He also wrote Lishi Yinjian (李氏音鑑), a work of Chinese phonology, and complied Shou Zi Pu (受子譜), a valuable kifu of Go.
From a young age he had a rebellious nature. He strongly disagreed with the fixed style of composition (eight-legged essay) that people were required to learn in order to pass the examination needed to obtain a higher rank. Therefore, after obtaining the degree of xiucai (licentiate, the lowest in the examination hierarchy), he became a low-ranking officer, which was not considered respectable. However, his position did not mean that he was idle; he was a polymath, with expertise in astrology, medicine, mathematics, music, rhetoric, poetry, calligraphy and painting. His knowledge in all these subjects is amply reflected in Flowers in the Mirror, sometimes even to the hindrance of the plot.