Conclusion: If you want to repay through ICBC’s credit card service, but the system prompts that there is no eligible card or card number, you can actually make adjustments. The following are detailed steps:

First, log in to your ICBC personal online banking and enter your regular account information, including login name, password and verification code, to complete the login.

Next, in the menu bar at the top of the page, find and click "Credit Card Services", then select "Credit Card Repayment" - "My Automatic Repayment" option in the left menu bar to enter repayment Management interface.

In the operation area, you will see the current automatic repayment settings. Click "Query" to view the current settings, then select "Edit" to change the repayment card. In the drop-down box that pops up, select the new card number you want to use for repayment, making sure you select the bank card you want to use.

In order to obtain the best repayment effect, it is recommended to choose "Optimal Repayment" as the new repayment method. After carefully checking all information, click the "OK" button to make changes.

Once you click "OK", the system will verify the transaction. If everything goes well, the repayment card number will be changed successfully. At this point, you have successfully updated your repayment card number to the new option and can continue to use the new card for credit card repayments.