Is it illegal for the school to require boys to have a crew cut?
Legal analysis: not illegal. Schools have the right to manage students. In order to enforce school discipline, the school can require students to cut their hair uniformly.
Legal basis: Article 27 of the Compulsory Education Law of People's Republic of China (PRC) stipulates that schools should criticize and educate students who violate the school management system, and may not expel them.