First of all, it depends on whether the local store supports your ABC Jinsui business card, because this card has three card faces at the same time, one is UnionPay only, the other is UnionPay +VISA, and the other is UnionPay+MasterCard.

If you are the first card face, that is, only the UnionPay logo, when you swipe your card in Korea, it depends on whether the store supports UnionPay cards. If the UnionPay logo is posted, you can swipe your card. After swiping the card, UnionPay will automatically convert the amount of won into RMB for bookkeeping.

For example, after purchasing goods of 10000 won by credit card, about 56 yuan RMB will be deducted from your card according to the exchange rate. After returning to China, you can directly return to 56 yuan. If the Korean store you go to doesn't support UnionPay cards, you can't trade with the first card.

However, if it is a dual identification card of UnionPay +V or M, you can use the V or M credit card machine for transaction. After swiping the card, V or M will convert the amount of won into US dollars for bookkeeping, but an additional handling fee of about 1% to 1.5% will be charged.