Chinese customs gold unit

The customs gold unit (CGU, Chinese: 海關金單位兌換券) was a currency issued by the Central Bank of China between 1930 and 1948. In Chinese, the name of the currency was Chinese: 關金圓, romanized: guānjīnyuán, lit. 'customs gold yuan') but the English name given on the back of the notes was "customs gold unit".