You can choose the repayment method by looking at the credit card application form at the application stage. If you don't make a choice, the bank will open the RMB credit card automatic foreign exchange purchase repayment service for you by default. Rmb credit card automatic foreign exchange purchase repayment-sign an agreement on RMB credit card automatic foreign exchange purchase repayment-select this function, you can deposit funds into RMB credit card and return the account associated with USD credit card. Automatic repayment of account-sign the automatic repayment agreement of Citibank deposit account-select to enable this function, and the corresponding amount will be automatically deducted from your designated Citibank deposit account on the due repayment date every month, and the USD arrears will be returned. Repay in person at the counter-you can deposit the US dollars directly into Citibank in person, or you can use RMB to purchase foreign exchange to repay the US dollar arrears. ? RMB credit card automatic foreign exchange purchase repayment function and account automatic repayment function can be applied for or modified through customer service hotline.