As you said, at present, most credit cards are settled by signature according to international practice, so there is a certain risk of misappropriation. It is stipulated that salespeople need to be trained in signing, and they should sign when trading, but there are few regulations in China at present. Please try to keep your credit card well. In addition, if a credit card can be set with a spending password (such as China Construction Bank), please be sure to set a credit card for spending, and don't let the card leave your sight. Please report the loss of this card immediately. If it is verified that someone forged a signature to swipe the card, the bank will bear it.

thank you