When a hotel on South Korea's east coast was asked at short notice to host nearly 280 North Korean visitors, the problem wasn't finding enough rooms.
It was to learn how not to offend them.
Within days of the request, the roughly 150 staffers of the four-star Inje Speedium Hotel & Resort were attending sessions on North Korean words and manners, one of which was taught by a professor who used to teach defectors from the North.
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