ExchangeRateComp https://usa.visa.com/support/consumer/travel-support/exchange-rate-calculator.html?fromCurr=CNYChina+Yuan+Renminbi&toCurr=HKDHong+Kong+Dollar&fee=0&exchangedate=10%2F14%2F2015&submitButton.x=121&submitButton.y=14

汇率查询_境外用卡服务_服务中心_银联国际 http://www.unionpayintl.com/MainServlet

银联是0.8204
VISA是0.8174

我一直以为VISA是HKD-USD-CNY，要比银联高呢
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