Folk songs have certain rules. You can sing lingering and heartbreaking love songs in the wild, but you must first ask the other person's name, marriage, family situation and so on. In order to hear this song clearly, it is necessary to keep a certain distance from the singer. Don't sing intimate songs in the house. Praise the main family warmly at first, and then sing other songs. Duets are mostly held in various festivals, and young men and women can throw hydrangeas and touch eggs to make up their minds.