(Feb 17, 2012)
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| pinyin | zhū), and was the equivalent of about 16 grams | 2.5 grams
ca.200 BC
24.5 mm in diameter
Obverse and reverse of a Ban Liang coin from the Western Han Dynasty
The liang, the Chinese ounce, consisted of 24 zhu (Chinese: 銖
Thus the original Ban Liang weighed the equivalent of 12 zhu - 8 grams
In 186 BC, the official coin weight was reduced to 8 zhu, and in 182 BC, a wu fen (Chinese: 五分
In 175 BC, the weight was set at 4 zhu
Private minting was permitted again, but with strict regulation of the weight and alloy
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