1. Online inquiry: Log on to the official website of Harbin Bank, select "Inquire about Credit Card Information" on the credit card account page, enter the ID number and inquiry password, and then select "Inquire about Credit Card Information" to inquire about your own credit card number.
2. Customer service telephone inquiry: Call Harbin Bank's credit card customer service telephone, and according to the voice prompt, switch to manual service, and ask the customer service staff to help them inquire the credit card number.
3. Enquiry of outlets: Bring my ID card to the counter of any outlet of Harbin Bank for enquiry.