Nine-year compulsory education includes primary school and junior high school. According to the law of educational development, primary school and junior high school are the basic stages for students to receive education. Primary education is an important period for students to learn basic knowledge and cultivate basic abilities and habits, while junior high school education further consolidates and deepens the basic knowledge of primary schools, laying a solid foundation for students to enter high school and their future careers.

Bringing these two stages into the scope of compulsory education is conducive to safeguarding students' basic educational rights and promoting educational equity.