Social rules that you must know when mixing in the circle; 1. Don't go to bed with your confidant. 2. Don't marry your lover. 3. When eating and spending on a AA basis, you must understand the five levels of inclusion. For example, give 60 yuan when you give 59 yuan. 4. Don't stand up for the collective interests, the eyes of the masses are blind. 5. Ask the price before getting a haircut at a barber shop. 6. Don't take it lightly after eating someone else's meal, because whoever pays for it remembers it best. 7. You must learn to hide two things. One is your thoughts, and the other is your ability. 8. Relationships that are formed too quickly usually don't last far. 9. When staying in a hotel, don't stay in the one at the end of the corridor. 10. Don't leave your contact information at a nightclub. 11. Dislike people who are poor and fear people who are rich. Hate people who have and laugh at people who don't. This is an unchanging law. Please add any other social etiquette!