Cardholders should pay attention to the fact that the quotas of different currencies in multi-currency credit cards are shared. For example, the credit limit of a multi-currency credit card is 5000 yuan. If one currency account of this multi-currency card has been overdrawn by 3000 yuan, then the remaining 2000 yuan credit line can only be used for other currency accounts of this multi-currency credit card. This means that all currency accounts in this multi-currency credit card share a credit line of 5,000 yuan, instead of all currencies of this multi-currency credit card having a credit line of 5,000 yuan.