In fact, how many dishes are cooked on a birthday depends on the number of people who come to the birthday party. If it's just a birthday for a family of three, there are no taboo figures. Three dishes and one soup are more suitable, two dishes are too few, and the meaning of three dishes alone is not good. Three dishes and one soup, put on the table, become a double number, and the homophonic meaning of the number 4 is still good. As the saying goes, "you can't serve three courses when entertaining guests", which means you can't prepare three courses when entertaining guests. Many people will avoid the number of three courses. "Three" is commonly used in ancestor worship. So in this more formal occasion, we should pay attention to some taboos.