Domestic credit cards were first issued by the Bank of China. At that time, it was called RMB Great Wall Card, which could be overdrawn, but a deposit was required. There were already photo cards at that time. On the back of the card, there will be the cardholder's photo and ID number, but they must bear the expenses of 20 yuan. If there are no photos, they must show their ID cards. Almost no one has this kind of card now, and it has been replaced by the current credit card. All banks also have photo cards, but most of them are made of card faces, and photos are not necessary. The purpose is only to show personality, so the signature method is still not in line with China's national conditions. After all, merchants can't do it, and cardholders can't do it themselves. In the past, you can choose to sign or password plus signature. Now the bank attaches great importance to this and encourages cardholders to choose a password and sign. But now a bank has launched a new business, that is, the bank will bear the accounting problem 48 hours before reporting the loss, but it has never been encountered in actual operation, and I don't know what the process is.