How to convert the yen in the account, the euro, and the Hong Kong dollar into the US dollar -profit

If the exchanges between the two foreign currencies through the operation of the China Merchants Bank or confirmed the two foreign currencies, you can check the real-time financial information-foreign exchange real-time inquiries through the homepage of the China Merchants Bank.
or logging in to China Merchants Bank's official website, find the "Forex" menu in the middle of the official website interface, click "Foreign Exchange Software" in the lower left corner of the left corner. Foreign exchange market software shows the quotation of Reuters, not the quotation of our bank, the quotation is available for you For reference, you can view and analyze the trend through this software. (Foreign exchange passage software can only be downloaded on the computer, there is no mobile phone or iPad version)