First, when purchasing through UnionPay channels overseas, the cardholder is required to enter a password and compare the cardholder’s signature with the signature on the back of the credit card;

Second, If you take the VISA or Master route, you generally do not need to enter a password, and some foreign credit card passwords only have four digits, which are different from the domestic six-digit passwords. When swiping the card to make purchases, you only need to compare the cardholder's signature.