2. For offline payment, you only need to know the card number, expiration date and CVV code (that is, the three numbers next to the signature column on the back of the card) to complete the payment.

At present, there are not many places in China where offline payment can be made. But many foreign websites can use offline payment. Domestic hotels also have this kind of offline payment.

For the sake of safety, I personally suggest that

First of all, you apply to the bank for card replacement (such as M card, V card, or V card for M card), which is basically free. Only by changing the card, the CVV on the back will change and the validity period will change. The card number will also change.

Secondly, after the card is finished, stick the three numbers with tape. Anyway, you don't have to swipe your card at ordinary times, which is remembered by you, but it is risky.

If you don't understand, you can continue to ask questions and hope to adopt them.