The one that I know if is Pyeonghwa Motors and it has its main factory in Nampo which is on the west coast, not near the border. It's definitely not their only car factory either. There might be some on the border with China now, I don't know either, but at the very least there's also the older Sungri Motor Plant that has made vehicles for DPRK since like the 1950s, but it's pretty much right in the center of the country.
@couldhavebeenyou@lemmy.zip, looks like your prediction was shit.

