The four colors are Spade (also known as Kuifan), Heart (also known as Red Peach), Club (also known as Grass Flower), and Diamond (also known as Terracotta or Square Tile, referred to as "Ba Pian" in the Sichuan Chongqing region). Spades and plum blossoms are black, while the other two are red hearts and squares. Thirteen pieces per color, consisting of numbers one to ten and the English letter J Q、K。 The cards from one to ten are represented by the number of color patterns, while J, Q, and K are represented by headcards.

So why do playing cards only have four patterns as suits? There have been many claims throughout history.

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It is said that these four colors represent the four main industries of society at that time, among which spades represent spears and symbolize soldiers; Plum blossom represents the three leaf flower, symbolizing agriculture; Square tiles represent the bricks and tiles used by craftsmen; Red peach represents the red heart, symbolizing the priest.

Another theory is that these four colors are derived from the patterns of ancient European divination objects, among which spades represent olive leaves and symbolize peace; Plum blossom is a clover, which means luck; The square piece is in the shape of a diamond, symbolizing wealth; And the red peach is in the shape of a red heart, symbolizing wisdom and love.