Legal basis: Article 25 of the Education Law of the People's Republic of China states that the state pays all in-service teachers' wages during school or holidays. Moreover, the state stipulates that the salary of teachers is not lower than that of local civil servants, and the treatment of teachers has been greatly improved at present and will continue to be improved in the future. In-service teachers run classes with compensation, which violates the principle of educational public welfare and the principle that running schools should not be for profit. Teachers should set an example of social morality and law-abiding, and the illegal acts of paid tutoring and paid remedial classes must be corrected.