Three ways: 1. Inter-bank transfer repayment: If online banking or mobile banking is enabled on ICBC card, inter-bank transfer repayment can be made. You can also remit money to CCB credit card at ICBC counter. This method is relatively slow, generally at least 2 working days (excluding weekends and holidays). As ICBC transfers money, it will charge a certain handling fee (please consult ICBC customer service for specific standards), but CCB will not charge it.

2. If you have Alipay, you can bind the ICBC card, and then use the "credit card repayment" function on Alipay to transfer it to the CCB credit card. This way, there is no charge on both sides, and the arrival time is faster, and it will arrive the next day.

3. Withdraw cash from ICBC card first, and then deposit it on CCB credit card at CCB counter or ATM, free of charge. This method is a bit troublesome, but it takes the fastest time to arrive at the account, and it is not easy to miss the account. This method is recommended if there are CCB outlets near the landlord.