On this day 214 years ago, on January 22, 1811 (December 28, 1810 lunar calendar), Chinese Qing Dynasty mathematician Li Shanlan was born. Li Shanlan (1811.1.22~ 1882.12.9) was a mathematician, astronomer, mechanic, and botanist in the Qing Dynasty. Formerly known as Xinlan, the word Jingfang, the name Qiu Sewing, the alias Renshu. Zhejiang Haining native. Born on December 28 (January 22, 1811) in the fifteenth year of Qing Jiaqing; died in Beijing on October 29 (December 9, 1882) in the eighth year of Guangxu. He liked mathematics since childhood, and later all students took the test in Hangzhou. He got the famous mathematician Li Ye of the Yuan Dynasty to write "Measuring the Circle Sea Mirror". According to his research, his attainments are getting deeper. In the early days of Xianfeng, he lived in Shanghai. From 1852 to 1859, he co-translated the last 9 volumes of Euclid's "Elements of Geometry" with the British sinologist Willy Alexander in Shanghai, completing the unfinished business of Xu Guangqi and Matteo Ricci in the late Ming Dynasty. He also co-translated with Willy Alexander, Eyoser and other Western mathematics and natural science books such as "The Dimensional Accumulation Level 2", "Re-study", "Talk about the Heavens". On the same occasion, he first entered Jiangsu Governor Xu Youren and Governor Zeng Guofan of Liangjiang, and he relied heavily on his proficiency in mathematics. In the seventh year of Tongzhi (1868), upon the recommendation of Governor Guo Songzhao, he entered Beijing as the chief teacher of arithmetic at Tongwen Library, and was awarded the positions of Langzhong of the Ministry of Household Affairs and Zhangjing of the Premier Yamen, and the titles of three ranks of officials. He took "Measuring Circular Sea Mirrors" as the basic textbook and cultivated a lot of talents. He learned ancient and modern, and integrated Chinese and Western mathematics in one class. Since 1860, he has participated in scientific and technological activities in the Westernization Movement. From 1868, he served as the chief teacher of astronomy and arithmetic at Tongwen Library in Beijing until his death. The main works are all collected in "Zegu Xizhai Arithmetic", 13 kinds of 24 volumes. Among them, the discussion of pointed cone quadrature has begun to have the idea of integration. The research on the expansion of trigonometric functions and logarithmic power series, and the summation of higher-order equidifference series have all reached After Mei Wending, he became another outstanding representative in the history of mathematics in the Qing Dynasty. He translated a lot of Western scientific and technological books in his life, introduced the latest achievements of the most important knowledge of modern science from astronomy to plant cytology into China, and made outstanding contributions to the development of modern science.