English: A Guangxu Tongbao cash coin fitted to be exactly one (1) kuping qián.
"Kuping" (庫平; kùpíng; "treasury standard") refers to a national standard of weights and measurements created by the Manchu government to create a singular decimal system in China.
Attribution: Scott Semans World Coins (CoinCoin.com)
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Captions
A Guangxu Tongbao cash coin fitted to be exactly one (1) kuping qián. "Kuping" (庫平; kùpíng; "treasury standard") refers to a national standard of weights and measurements created by the Manchu government to create a singular decimal system in China.