According to relevant laws and regulations and education laws, it is illegal for teachers to corporal punishment or corporal punishment of students in disguised form, such as copying 50 times. Teachers should respect the personal dignity of minors, and may not carry out corporal punishment, disguised corporal punishment or other acts that insult personal dignity. The Law on Teachers clearly stipulates that teachers who have bad conduct and insult students and persist in corporal punishment after education can be given administrative sanctions or dismissed. It is a violation of relevant laws and regulations for teachers to punish students for plagiarism 50 times, which is regarded as an illegal act.