Enquire, collect evidence, etc. through bank customer service or counter.

1. Inquiry through bank customer service or counter: You can contact the bank customer service staff or counter of the credit card you use to explain the situation, and provide the other party’s credit card information and contact information. Ask the counter to assist in checking whether the other party has any unsatisfied credit card. Record of repayments.

2. Collect evidence: Collect records of communication with the other party, text messages, WeChat, IOUs and other evidence for subsequent use.

3. Sue or call the police: If the other party refuses to repay the debt, you can consider filing a lawsuit in court or calling the police. When suing, you need to provide relevant evidence to prove the fact and amount of the money owed by the other party, and request Lawyers assist in prosecution and can apply for enforcement if the other party refuses to fulfill the court's judgment.