Yes, but most domestic credit cards are in US dollars. The most comprehensive Bank of China only has Japanese yen cards, Hong Kong dollar cards, euro cards, and pound cards. There is no pure Korean Won card, and most domestic credit cards default to RMB-USD dual-currency cards, so when you swipe a card in South Korea, you are actually spending money in US dollars. It seems that there is no handling fee for swiping at the POS machine, but you have to pay up to 1.95 to international monetary institutions. % currency conversion fee, for example, if you spend one million won, you will have to pay a handling fee of nearly 20,000. It’s too high. It’s recommended to bring traveller’s checks if you travel. If you study abroad, apply for a local credit card.