Do I need to exchange Korean won for traveling in Korea?

Required.

According to inquiries on the Korean Visa Network and the Korea Tourism Organization website, it is necessary to exchange Korean won when traveling to South Korea, but it is not recommended to exchange too much in the country, because the domestic exchange rate is much lower than that in South Korea, and it also requires Make a reservation in advance. Generally speaking, the most convenient and cost-effective way is to bring a UnionPay debit card or credit card directly and withdraw cash or swipe the card at an ATM machine in Korea. This way you can enjoy UnionPay's preferential exchange rate and don't have to worry about the safety of the cash. If you want to use cash, you can bring some RMB to exchange at a local money exchange in South Korea. For example, there are many money exchanges in popular shopping and tourist places such as Myeongdong and Dongdaemun, and the exchange rates are relatively high. You can compare with several more. Choose the one that suits you best.