This card game spread to Europe in about the third century A.D./KLOC-0. After a period of time, cards evolved into cards, gradually forming ordinary playing cards and becoming international playing cards.
The earliest number of playing cards varied from place to place. 78 in Italy, 32 in Germany, 40 in Spain and 52 in France.
In the future, there will be 52 cards in each deck of international playing cards, plus two wild cards (also known as kings or children) and 54 cards. At this point, the design and color, the number of points and the patterns of K, Q and J on the playing cards are basically finalized.
Playing cards are divided into four colors, namely spades, hearts, diamonds and clubs. Four colors have different names. The French call it "spear, heart, square and clove leaf", the Germans call it "leaf, heart, bell and acorn" and the Italians call it "sword, coin, stick and wine glass".
Later, according to the calendar in astronomy, westerners unified the content of this card game, which was set at 54 cards and four colors. In this way, after a long period of evolution, it gradually tends to be consistent.