It is said that playing cards have a long history. They originated in the late Tang Dynasty and were invented by a famous mathematician. They were originally called "Yi Zi" and later evolved into "Jiuling Ye Zi". In the early Ming Dynasty, it evolved into "counting money and leaves". In the late Ming Dynasty, the complex was simplified and evolved into the horse-drop tile (commonly known as the sparrow tile) with "wenqian", "cross", "suozi" and "ten thousand characters". In the early Qing Dynasty, people painted "wenqian" as a "cake" based on the horse falling card (the patterns of the cakes are all in the shape of ancient coins), painted the "suo" character as "bar", retained "ten thousand", and changed the "cross" character The paintings are "red flower", "white flower" and "yangqian", which are still used today. Manufacturers such as Rugao and Taixing added blessing, fortune, longevity, happiness and talent to call them "five happiness".