1. online inquiry: directly download the APP of the corresponding bank or search for the corresponding WeChat WeChat official account, find the credit card business through business navigation and inquire about the corresponding principal and interest.

2. Telephone inquiry: Call the customer service phone number of the corresponding bank, then transfer to manual customer service, and then inform the credit card information and other relevant information to inquire about the principal and interest.

3. Counter inquiry: All credit cards have their own banks. Go to the bank counter, show your credit card and explain the business you want to inquire about, and staff will help you deal with it.