China's first book on logic was Introduction to logic. The book was written by Professor Wang Guowei of the School of Philosophy and Logics of Peking University in 1924. It was one of the important milestone in the development of Chinese logic. The book introduced the basic concepts, principles and methods of logic in detail, including propositional logic, predicative logic, proof logic, etc. It also elaborated the practical application value of logic in the form of examples and cases. This book was praised as the basic textbook and teaching reference book of Chinese logic, which had a far-reaching impact on the development and popularity of Chinese logic.