In ancient China, the use of silver coins was very small, mainly in some areas or ethnic minority areas. Kangning Palace Money was cast in Qianlong period of Qing Dynasty (1736— 1795), and was used by emperor Qianlong to admire the palace and celebrate his birthday. There is a double dragon pattern on the back of Kangning Palace. Shuanglong is connected with the side of the square hole, with its head facing outwards. It is the nature of spending money, and it should be regarded as a kind of money. There are many records of ancient money. The amount of money in Kangning Palace is very small, and most of it is copper and iron.