What does Tongguan at the banquet mean?

Hello, do you mean the customs clearance at the banquet? To pass the customs at a banquet is to have a drink with everyone present. When drinking at the banquet, you should have a drink with all the people who drink here, that is, the table is turned over, which means that the last person you drink is closed again, the first person has one drink, the second person has two drinks, the third person has three drinks, and so on.