Chinese customs gold unit 海关金单位兑换券

The customs gold unit (CGU) was a currency issued by the Central Bank of China between 1930 and 1948. In Chinese, the name of the currency was 關金圓, literally "customs gold yuan" but the English name given on the back of the notes was "customs gold unit". It was divided into 100 cents (關金分). As the name suggests, this currency was initially used for customs payments, but in 1942 it was put into general circulation for use by the public at 20 times its face value in terms of the first Chinese yuan.