A leader once told me that we must pay attention to harmony no matter in the workplace or in society. Although people who don't pay attention to harmony may take advantage for a while, they will definitely suffer big losses in the long run. My opinion is that people who bully others are generally villains. It is useless for villains to use quarrels with you. The worse he treats you, the more he uses dirty tricks to treat him better, and let more people know about you, intentionally or unintentionally. For his good, the villain is not afraid of pain but afraid of public opinion. When everyone sees you being nice to him, he won't be able to bully you, otherwise no one will care about him. If you confront this kind of person, he will use all kinds of unimaginable dirty tricks to ruin your reputation. It's useless, unless you make him afraid of you for the rest of his life once, but it's basically difficult. The leader taught me this trick. He used it when he was young and it worked well.