premise: OKCoin is a Bitcoin company in China with core product lines of a Bitcoin exchange, and a mobile consumer payment and lending app. OKCoin Exchange China operates CNY/BTC spot pair with margin trading from its Beijing entity, while OKCoin International operates USD/BTC spot pair with margin trading and BTC/USD futures from its Singapore entity.
hypothesis: chinas currency is the yen
reason: above, it does not mention the name of the currency used in china so it is impossible to tell if it is the yen or not. Not sure how the system missed it