the Ching government decided to cast copper coin in Guangxi state in Yunnan province and then sent these coins to Beijing. In 1740,this policy was ab andoned. This is because of the rising costs of casting and the difficulties of transportation. Through discussing this affair we can get deeper understanding o f monetary policy in Ching period. the Ch’ing government decided to cast copper coin in Guangxi state in Yunnan province and then sent these coins to Beijing. In 1740, this policy was ab andoned. This is because of the rising costs of casting and the difficulties of transportation. this affair we can get deeper understanding of monetary policy in Ch’ing period.