If you can't remember the credit card number, the following is for your reference: 1. Try to find the previous credit card documents; 2. Do you remember whether you have bound a credit card through a third-party channel? You can try to view it through the binding platform; 3. I tried to ask through the local counter; 4. If you have a professional version of China Merchants Bank UK, please try to log in to the professional version (you need to apply for a professional version and have a credit card). For 6.0 Professional Edition, check the card number in "Professional Edition Management-Certificate Associated Credit Card". The professional version above 7.0.9 can't check the credit card number at present, please try to contact the credit card center. 7.0.9 For the following versions, click Settings-Associated Card Management in the upper right corner. If the credit card is not associated, please click "Associate Credit Card". 5. If your family has paid back the money for you, you can confirm whether there is a record of transferring out of online banking or whether it can be found.