In fact, people are all the same, good and bad, and we can't generalize. The Koreans I met were very friendly. At school, most people are friendly. Of course, some people have a problem with China. But now most Koreans think that China is strong and China people are great, so despise them. But if you work, the boss may be more black-hearted, for money. But it's good to have a good relationship with your aunt at work. They will help you. As long as you are diligent.

PS: Koreans are very jealous. Both men and women, especially in international affairs, are unwilling to lose to China. So hit them hard and they will respect you. Just mean.