Dollars are spent on the cruise ship Lucky, and the credit card is bound to the ship card, so the ship card is used for consumption. This credit card must be marked with VISA, MasterCard, etc. If you have enough time, it is more convenient to get one. If it is too late, the ship card also supports pre-depositing cash, just like depositing telephone charges, deducting as much as you spend and settling before leaving the ship. It's best to change the pre-deposited cash into dollars at the bank here in advance. According to the feedback from the guests of our pocket cruise ship, it is not cost-effective to exchange RMB for US dollars on board.