The guests are staying at Tianjin Jiuhe International Villa . Generally, the amount of foreign exchange per person is 50,000 US dollars per year.But if the guest shows bank the leasing agreement only,they don't need to use their limit of 50,000 US dollars for the payment of the room charge .Jiuhe International Villa has a good relationship with the bank ,so the guests staying there don' need to use their limit of 50,000 US dollars . The guests' income is US dollars and their living expenses also need to be exchanged. If they have to use the foreign exchange limit for room charge, their living expenses will not be enough.That is why your team is expected to work on with the bank. Thank you for your understaning and support.