I want to travel to Korea, if the group is a visa or something.

It is very convenient to travel to Korea now. If you join a tour group, it usually takes 10-30 days to get a visa to a travel agency. Because of the group, the time is uncertain You should prepare at least 15000 RMB for the expenses of three people, travel expenses and other things you want to buy or buy souvenirs. I hope you have a pleasant trip.

How much won should I take with me when traveling with a group in Korea?

You can change 1000 RMB into won first. It is better to change a part and keep a part until it is not enough. Because you are traveling with a group, how much money you need to bring depends on your consumption desire. In fact, UnionPay cards or international credit cards can be used there. If you want to buy local snacks and snacks, you can exchange some won locally. You don't need me. I don't need to carry a lot of cash with me. There is hardly any place to spend money except shopping. If you are going with a group, you can exchange money with the local tour guide. You can change money at the airport yourself. If you change tickets at the airport, you must pay. You'd better change some dollars at home first. You can buy things in duty-free shops with UnionPay cards, and you can buy things in duty-free shops with US dollars and RMB. But if you buy things elsewhere, you have to pay won. How much won you need depends on how many things you buy. A bottle of mineral water 1000 won is more expensive for drinks and fruits. When you leave the airport, you have to change the inexhaustible won into RMB. Cosmetics under 100ml should be packed in transparent bags at the airport before they can be taken on the plane, so it is best to leave 100 won and buy a transparent bag in the supermarket outside the airport security check. Otherwise, if you are found in the security check, you still have to go out and buy it. At that time, you will have to ask for 100 won. If you don't do this, I can't win. Hehe, it's just a few cents. Have a nice trip!