Legal analysis: it is illegal to open a cram school without permission. The Education Bureau clearly stipulates that in-service teachers can't make up lessons for students privately during the holidays, which means that they can't run cram schools during the summer vacation.

Legal basis: Article 75 of the Education Law of the People's Republic of China According to the past situation, all in-service teachers used the winter and summer vacations to run classes without the approval of the Education Bureau, because teachers have the right to rest and participate in training, and these rights of teachers should be guaranteed during holidays.