The repayment of foreign exchange purchased by CITIC Bank's credit card online banking is only for the foreign currency arrears that have been billed. The specific operation steps are as follows:

1. Log in to the credit card website of CITIC Bank, click Login to Online Banking, and select Repayment Assistant-Repayment by CITIC Debit Card-Repayment by Purchase of Foreign Exchange, and read the repayment tips for purchasing foreign exchange by online banking credit card of CITIC Bank.

2. Confirm the repayment information of foreign exchange purchase, including credit card account number and debit card account number.

3. After clicking Submit, enter the amount of foreign currency to be repaid and the repayment password (that is, the debit card transaction password) to complete the purchase of foreign exchange.