Credit card consumption mainly depends on the payment methods he adopts, such as MASTER, VISA or UnionPay, JCB, etc. Credit cards provided by Korean banks in China generally support MASTER+ UnionPay or VISA+ UnionPay. If you want to buy something at GMARKET, it depends on which network settlement you accept. If you have the above methods, you can buy them. In addition, if you choose MASTER or VISA, its settlement will be from won to US dollars and then to RMB, and if you choose UnionPay, it will be from won to RMB, which will save some exchange rate fees.