> On the other hand, you'd probably have a hard time telling the difference between a Korean and a Chinese northerner who lives near the Korean border, as well

> On the other hand, you'd probably have a hard time telling the difference between a Korean and a Chinese northerner who lives near the Korean border, as well as the difference between a Vietnamese person, and a Chinese southerner who lives near that border." Not once they start talking! I'd never mistake a Korean for a Dongbeiren!