There are many norms, such as: the strength of the school is open, the enrollment is transparent and fair, and the legitimate rights and interests of teachers and students are protected.

At present, the Third Plenary Session of the 18th CPC Central Committee has emphasized the key points.

No matter the key classes or non-key classes, the class capacity should not be exceeded, and the course should be open and complete, with daily physical activities 1 hour.