Chinese grammar
Li Jinxi studied modern Chinese grammar theory, and advocated the Mandarin revolution. His book, "New Chinese Grammar" (), published in 1924 by Shanghai Commercial Press, was a comprehensive and systematic description of the modern Chinese grammar. This book, the summary of his long years’ Chinese teaching experience, was applied to the high school education, so it produced a lasting effect on student generations in China from 1920s through 1950s. When Li Jinxi devoted himself in proceeding the reform of Mandarin, he especially focused on promoting the alphabetic writing invented by Zhang Binglin and advocated by Wu Zhihui, for adult literacy project () and children literacy education. However, the July 7th incident of 1937 left phonetic molds in the Japanese occupied territory. As a result, his dream of promoting the phonetic alphabetic failed.