Legal analysis: Teachers' winter and summer vacations are not legal holidays. Rules and regulations and teachers' employment contracts should also be observed if there are arrangements for the work during the winter and summer vacations. If you can't decide the reason, you can't shorten the holiday at will, otherwise you should pay overtime pay. It is illegal for teachers to work overtime without paying overtime.

Legal basis: Article 40 of the Labor Law of People's Republic of China (PRC), the employer shall arrange employees' holidays during the following festivals according to law: (1) New Year's Day; (2) Spring Festival; (3) International Labor Day; (4) National Day; (five) other holidays as prescribed by laws and regulations.

People's Republic of China (PRC) Teacher Law

Article 2 This Law is applicable to teachers engaged in education and teaching in schools and other educational institutions at all levels.

Article 7 Teachers shall enjoy the following rights: receiving wages on time, enjoying welfare benefits stipulated by the state, and taking paid vacations in winter and summer vacations;

Article 8 Teachers shall perform the following obligations: implement the national education policy, abide by the rules and regulations, implement the school teaching plan, fulfill the teacher employment contract, and complete the education and teaching tasks.