If you are really beaten for no reason, you can educate your children. The goodwill between the first two classmates is the most important. Be broad-minded and forgive the mistakes of unreasonable classmates.
Venus, a famous dancer, said in her Venus Show how to educate her children if they are bullied by others.
She said she would tell the children that if people don't attack me, I won't attack. If someone attacks me, I will put up with it. Call me back if anyone attacks me again.
If you just let the child bear it again, it will cause the child's cowardly character.
If you let the child return it immediately from the beginning, it will cause the child to be wronged, cautious, without a sense of the overall situation and narrow-minded.
So the best way is to tolerate others with your own mentality as long as others don't overdo it. The other side has gone too far, and it is ok to solve it by appropriate force.