Reason:

Private lottery stands for 4, one soup is 1, and four dishes and one soup add up to 5.

Four dishes and one soup

Four dishes and one soup, that is, a meal with four dishes and one bowl of soup. Later, with the increase of communication with other countries, four dishes and one soup gradually absorbed the characteristics and dining habits of western dishes, and many new dishes appeared. In May, 20 13, there were at least three out-of-shape phenomena in the official reception "four dishes and one soup".