Simple, first of all, it must be to call the police, let the police intervene to help you negotiate with the bank, then ask the bank to call out the detailed location and time of the consumption records, and then investigate every consumption place, enter the supermarket and ask to see the video and signature records of the day, and naturally you can see the signature style.

It is impossible to track down the thief, and there is no need to do that. Looking for a needle in a haystack, give the password in the future. Credit cards in China are different from those abroad. Foreigners only recognize signatures and check them carefully. Now you swipe your card in the domestic supermarket. Who will show you the signature? Be careful in the future.