Both the May 4th system and the 63rd system belong to nine-year compulsory education, and different countries and regions are different. Qingdao Edition is a textbook published by Qingdao Publishing House. The May 4th system is a five-year primary school, a four-year junior high school student, and the 63rd system is a six-year primary school and a three-year junior high school student. This comes from the formulation of the school education department. Because of the asymmetry of time, the contents of the version are different and need to be clarified.