There are not many credit cards used abroad. It depends on the work capacity and quota of your card, whether it is UnionPay, Visa or MasterCard.

UnionPay cards are not commonly used in many countries, but they are widely used in Hong Kong, which means it is best to bring one of these samples. Moreover, when you swipe your card abroad, you don't need a password, but you have to sign it all. Otherwise, you must sign your name in the signature column on the back of your card.