To be polite, you must learn to be courteous. Some people pretend not to understand. What should I say next?

The world is a hot and cold world, and it is hard to see through but not speak out. To be worldly, you need to learn the meaning of courtesy and reciprocity. Pretending not to know something is in the process of communication. Etiquette pays attention to reciprocity. Even if you understand some things, you have to pretend not to understand. The next sentence can be the world is in a hot and cold world. See through it but don’t explain it thoroughly. Understand. It is clear that people fawn over each other when they are rich and powerful, and become indifferent when they have no money and power. Although I understand it in my heart, I deliberately do not tell the whole story.