Xue Ji is not only the earliest educational and teaching treatise in ancient China, but also the earliest educational and teaching treatise in the world. It is one of China's ancient monographs on laws and regulations, The Book of Rites, which was written at the end of the Warring States Period. Xue Ji is concise and vivid, which systematically and comprehensively expounds the purpose and function of education, the system, principles and methods of education and teaching, the position and function of teachers, and the relationship between teachers and students and classmates in the process of education.