Nah, I know many Koreans with naturally porcelain white skin. And all of Asia has been obsessed with fair skin even before they met white people.
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depends on what you consider fair
http://i.imgur.com/lg4vzyW.jpg
I see Koreans here everyday (both tourists and immigrants), and they look very pale. They are pretty short on average though, and I find Chinese taller on average, and I've seen taller taller ethnic Chinese than taller Koreans.
Koreans tan better than Europeans who turn into lobster when they tan.
I have seen some very pale Koreans.