Poker has been changing for hundreds of years. The earliest western cards flowed into Europe from Asia in the Crusade War of13rd century, when there was only China card in Asia. Therefore, the development of western cards has a certain relationship with the spread of horse cards in China. /kloc-In the 6th century, a card called "Shengpai" was popular in the West. In the early17th century, it evolved into a whist card game similar to bridge, which was popular in London and England and Holland. 1894, bridge came into being in London Club, England, and this kind of bridge evolved into the present poker. Playing cards, as a kind of western cards, its design scheme also contains infinite knowledge. It is designed according to the calendar. In a sense, poker can be said to be the epitome of the calendar. There are 52 real cards in a deck of poker, which means there are 52 weeks in a year; The two cards are decks. The king represents the sun and Xiao Wang represents the moon. Because there are four seasons in a year, it is represented by four colors: spades, hearts, grass flowers and diamonds. Among them, red hearts and squares represent daytime; Spades and grass flowers represent the night. Every season has 13 weeks, so each suit is 13 cards; Every quarter is about 9 1 day, and the points of 13 cards add up to exactly 9 1. K, Q, J***, a total of 12 cards, which not only means 12 months, but also means that there are 12 constellations passing through the sun in a year. At first, playing cards were used as a tool to ask questions. The four colors of poker had different meanings at that time. At that time, the hoe-shaped black pattern of spades represented olive leaves, which meant peace. "Heart" is a heart, symbolizing wisdom and love. The black three leaves of "plum blossom" come from a kind of clover, and there are few four leaves. According to European and American customs, whoever finds a four-petal clover is "lucky", so clover represents happiness. The prismatic "square" represents the shape of a diamond and means wealth.