Legal analysis: teachers are not allowed to hold training courses outside. It is illegal for in-service teachers to handle remedial classes without permission. The Education Bureau clearly stipulates that in-service teachers can't make up lessons for students privately during holidays, which means they can't hold training courses.

Legal basis: Article 64 of the Law on the Promotion of Private Education in People's Republic of China (PRC) violates the relevant provisions of the state, and the education administrative department or the administrative department of human resources and social security of the local people's government at or above the county level shall, in conjunction with the relevant departments of public security, civil affairs or market supervision and management at the same level, order it to stop running schools, refund the fees collected, and impose a fine of more than one time but less than five times the illegal income on the organizers; If it constitutes a violation of public security administration, it shall be punished by the public security organ according to law; If a crime is constituted, criminal responsibility shall be investigated according to law.