A small amount of confidentiality and visa exemption:

It is a small fast payment service provided by China UnionPay for UnionPay IC cards with "flash payment" function, and customers do not need to open it separately. When swiping a card, you don't need to enter a password as long as the amount does not exceed a certain amount (generally below 200 yuan). If it is a savings card, you need to transfer it to a petty cash account before you can use it. If it's a credit card, you don't have to do anything, just swipe it directly!

Credit cards can be used not only for transactions without cards, but also for transactions without cards and secrets (no password is required). It is precisely because of this that the cardholder is advised to protect the CVV code on the back of the credit card (commonly known as "the last three codes" or CV2).

The correct use method is as follows:

Don't give the card to others, including reading it.

You can cut off a small piece of tape and stick it on the "last three yards".

Usually try to swipe your card at the counter to avoid leaving your sight.

At the same time, keep the credit card transaction receipt after consumption, and carefully compare the credit card transaction receipt with the monthly bill. If any abnormality is found, the bank shall be informed in time.