Korean cards can be used as long as they support VISA and MC card organizations

But you need to pay attention to the currency conversion fee, in two cases

1. The card itself supports U.S. dollars, and you can use U.S. dollars for settlement. You can use international channels in China without incurring fees

2. The card itself only supports domestic currencies, but you can use U.S. dollars and use international channels in China. There will be a Korean won-US dollar currency conversion fee. Please consult the card issuer for specific rates