Credit card repayment can be done online using the card number and password, but the specific operation method is slightly different from the payment platform. The following are the steps to use the card number and password for credit card repayment:

1. Open the payment platform or mobile application for credit card repayment, such as bank mobile APP, Alipay, WeChat, etc.

2. Select the credit card repayment option on the repayment page, and enter the credit card number, validity period, security code and other information.

3. Confirm the credit card information, enter the repayment amount and repayment date, and click Confirm Payment.

4. Enter the card number, password or other verification information, such as SMS verification code, etc., to complete the payment operation.