The teacher doesn't have to teach, manage or answer the children's questions for these two hours. Of course, it does not mean that teachers are obliged to do after-school services, and teachers also have corresponding remuneration.
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In my opinion, this model is definitely good news for parents. We should know that overtime work in many places is uncontrollable now, especially in first-tier cities, which are basically 996. Once the school is implemented, parents will feel more at ease about their work and will not worry about teaching their children homework when they go home.
But it may not be good news for teachers, because once this regulation is implemented, it means that teachers' working hours will be extended. Although there is compensation, many teachers don't want compensation. According to the statistics of China Education News, the working hours of teachers actually far exceed the legal working hours.