The key is: you have to have a bank credit card! Don't laugh, this is really crucial! If there is no credit card, how can I spend it, let alone repay it! More importantly, you need a savings card of CCB. You can open online banking, log in to CCB official website, then choose a credit card, choose to purchase foreign exchange for repayment, and make repayment according to the prompts. If you return your credit card for the first time, you will be prompted to add an account. At this time, you can purchase foreign exchange for repayment by adding your credit card account information. This is the way of online repayment, and the simpler way is to call CCB's credit card service number 400-820-0588. Then according to the voice prompt, the exchange rate is different every day, and there will be manual customer service to help with the operation.