If you don’t remember your credit card number, the following is for your reference: 1. Try to find the previous credit card receipt; 2. If you recall whether you have bound a credit card through a third-party channel, you can try to bind it through the binding platform Check it out; 3. I try to check it through the local counter; 4. If you have the Professional Edition UK of China Merchants Bank, please try to log in to the Professional Edition (you need to apply for the Professional Edition and associate a credit card). The 6.0 Professional Edition is in "Professional Edition Management-Certificate" Check the card number in "Associate a Credit Card". The professional version of version 7.0.9 or above is currently unable to query the credit card number. Please try to contact the credit card center to inquire. Log in to versions below 7.0.9 and click Settings in the upper right corner - Linked Card Management. If the credit card is not linked, please click "Link Credit Card". 5. If your family members have helped you repay the money, you can confirm whether there is a record of the transfer out of online banking or whether it can be queried.