The basic conditions for handling an international credit card are: 18 years old or above, with proof of income. From the credit card level, the higher the level, the higher the demand for income or fixed assets. For example, China Merchants Bank's American Express Centurion Green Card is open to the general public, aged 18 to 60 years old, with full civil capacity, good credit record, working income and repayment ability, and can apply. In addition, American Express cards currently issued in China, except all currency cards, are single-label credit cards in RMB, which can be used directly at home and abroad, and the repayment is collected in RMB.