I am not kidding. Kaesŏng Industrial Park pay rate is 1/3 of China at about 170.00 a month. It made S.Korea a powerhouse in a short time. Yes, China would love to shut it down.
Kaesong Industrial Park did not make S Korea a powerhouse, it wasn’t even established until 2002.
The operating profit in 2011 was about $56,000 according to Wiki