Junior high school for short. Junior high school is the primary stage of middle school, which generally refers to the nine-year compulsory education stage. It is a process of transition to high school and belongs to the category of secondary education.

In China, the academic year system of junior high school is three years: Grade Seven (Grade One), Grade Eight (Grade Two) and Grade Nine (Grade Three).

Compulsory education is a compulsory education for all school-age children and adolescents and a public welfare undertaking that the state must guarantee. The quality of compulsory education is related to the healthy growth of hundreds of millions of children, the development of the country and the future of the nation.