What would you do if someone laughed at you behind your back? What kind of mentality will you hold?

It's none of his business if he laughs again. He must be calm. Listen to other people's opinions more, so that we can do better in all aspects. It is idle people snickering behind their backs. Most people are busy and don't gossip so much. This kind of person has no future, so he has offended others, and he will suffer. If he talks too much, he will lose, and he will do whatever he has to do. How he smiles is none of your business. What you do is your own business and has nothing to do with others. Be independent, solve problems by yourself, be calm, and don't be moved by what others say. You should have your own ideas. Others are other people's business, and what you think is none of his business. Similarly, what he thinks is none of your business. Just be yourself. If you feel angry, you can play with friends or have fun with your relatives. You know, if he knows you are angry, he won't know how to be happy, so keep quiet and be yourself. He is nobody to you, so why do you care so much about what he says? He's just a fart. What he says is bullshit. Think of it this way.