What does spades a stand for?

As for why the pattern of spades is one of the colors, there are many concentrated opinions: first, these four colors represent the four major industries of society at that time, among which spades represent spears and symbolize soldiers; On the other hand, these four colors come from the patterns of ancient European divination tools, among which plum blossom represents olive leaves and symbolizes peace. And spades represent death, hearts represent love, and diamonds represent money. Good luck and happiness!