What do spades, diamonds, hearts and clubs represent in playing cards?

The four colors of heart, diamond, plum blossom and spades symbolize spring, summer, autumn and winter respectively. As for why these four patterns should be used as the design and color of playing cards, there has always been a lot of debate. There are two kinds of centralized views: one is that these four colors represent the four major industries of society at that time, among which spades represent spears and symbolize soldiers; Plum blossoms represent clover flowers and symbolize agriculture; Square represents bricks used by craftsmen; The heart represents the heart and symbolizes the priest. On the other hand, these four colors come from the patterns of ancient European divination tools, in which spades represent olive leaves and symbolize peace; Plum blossom is a four-leaf clover, which means good luck; The square is a diamond, symbolizing wealth; The heart shape symbolizes wisdom and love.