What's the meaning of spades on playing cards?

Four Colors China people understand four colors as four seasons: spring, summer, autumn and winter. The French understand the four colors as spear, square, clove leaf and red heart; Germans understand the four colors as leaves, bells, acorns and hearts. Italians understand the four colors as swords, coins, crutches and wine glasses; The Swiss understand the four colors as acorns, bells, flowers and shields; The British understand the four colors as shovel, diamond, clover and red heart. Why do you want to use these four patterns as the patterns and colors of playing cards has been said a lot. 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.