First of all, it must be illegal. The legal basis is the Guiding Opinions of the Ministry of Education on Strengthening the Management of Primary and Secondary Schools and Standardizing School-running Behavior, which belongs to departmental regulations. The contents are as follows: all localities are required to "scientifically arrange work and rest schedules to effectively reduce students' excessive academic burden", "resolutely correct all kinds of practices that arbitrarily occupy students' rest, correctly guide parents and society to actively participate, effectively reduce the excessive academic burden inside and outside classes, and protect students' right to rest according to law". Of course, the premise is that your school is a public school. If it is a private school, it is hard to say.

Secondly, I suggest you go to the website of the local education bureau to report, or call to report, which is much faster than going through legal procedures, saving time and effort.

Article 3 of "Guiding Opinions of the Ministry of Education on Strengthening the Management of Primary and Secondary Schools and Standardizing School-running Behavior" requires that all localities should scientifically arrange schedules, effectively reduce students' excessive academic burden, resolutely correct all kinds of practices of arbitrarily encroaching on students' rest, correctly guide parents and society to actively participate, effectively reduce the excessive academic burden inside and outside classes, and protect students' right to rest according to law.