Do Korean citizens need a visa to go to North China?

Of course, you need a visa to get there. But it seems that in the border trade mode, you don't have to have a passport, you can apply for a border defense certificate. This is how I used to go to Vietnam. You can check it online, especially the information in the travel agency hotel in Dandong is more accurate. If the hotel says yes, you don't have to worry. Other areas are generally handled according to formal procedures. )