Is it better to exchange Korean currency in Korea at home or in Korea?

Change it in China first. Not too much. We'll change it when we go to Korea. The black market in South Korea is more cost-effective than that in China.

Based on the middle price of the bank, it can be longer, so you need to lighten up this.

Don't change dollars. Converting RMB into US dollars and then into Korean won is equivalent to being exploited twice. Take RMB directly. -Students studying in Korea