What should children do if they have an argument with their classmates at school?

Based on the principle of inviolability of the person, the actor should bear the legal consequences of his own actions, and the person with no capacity or limited capacity should be borne by his guardian. So, you can find the school first. If the school doesn't care, call the police and let the police handle it. On the one hand, if the hitter is over 14 years old, the police will take care of it. Article 188 of the Civil Code stipulates that if a person without or with limited capacity for civil conduct causes damage to others, the guardian shall bear tort liability. If a guardian fulfills his guardianship responsibility, his tort liability may be reduced. If a person without capacity for civil conduct or a person with limited capacity for civil conduct owns property and causes damage to others, he shall make compensation with his own property. The insufficient part shall be compensated by the guardian. Article 172 of the Law on Public Security Administration Punishment stipulates that a person who has reached the age of 14 and under the age of 18 who violates public security administration shall be given a lighter or mitigated punishment; Persons under the age of fourteen who violate the administration of public security shall not be punished, but their guardians shall be ordered to strictly discipline them.