The first type: agreed account, personally recommend this. ] Use CCB's savings card and credit card for binding. As long as there is money in the savings card, the bank will deduct the money from your savings card to the credit card on the due repayment date, which is the most worry-free.
Second: transfer the money back,
CCB to CCB: CCB's savings card can be transferred to credit card through CCB's online banking, ATM and mobile banking (the transfer function should be opened at outlets).
The third type: paying back the money in cash, which is the most direct, can go to the counter of CCB (there are many people at the counter, and the self-service equipment is fast) and can be used on the deposit machine.