1. publicity: compulsory education is a national public education funded by the state. All school-age children have the right to education and can enjoy free or low-cost education.

2. Universality: The main goal of compulsory education is to ensure that all school-age children can receive primary and junior high school education, including quality education, science education and cultural education in the compulsory education stage.

3. Unity: Compulsory education emphasizes unified management of schools, unified design of teaching plans and unified planning of courses.

4. Persistence: Compulsory education is a long-term and continuous process, starting from primary school and continuing to junior high school. In this process, students gradually accept more knowledge and skills to prepare for future study and life.

5. Differentiation: In the compulsory education stage, students' basic physical and intellectual conditions are different, which leads to their different learning speed and learning results. Therefore, compulsory education emphasizes the design of educational plans and courses according to the different needs of students, and provides targeted guidance and support to students.