South Korea

Last year, I flew with Air France from Seoul/South Korea to Paris/France and after the aircraft was started, the crew walked through the cabin with some strange mango-taste-smelling spray. They told us, this was for security reason and korean law. I just remembered that yesterday and I'm still confused, what kind of spray that way?

The estimated temperature in South Korea at that time is supposed to be about -3 degree celsius. Might even drop to -11 degree celsius as told by some people. I had bought long johns, down jacket, sweater, scarfs and wollen caps already but I wasn't sure if ear muffs are necessary. Are ear muffs more of a accessory? It is my first time to a winter trip as I live in Singapore (tropical weather) so I need some advice. Thank you.

I am chinease, i study in TP singapore, in holiday i planning to go south korea ,but i do not know how to get the visa, I want go there by my self, and how much money will cost me ,BESIDE I have chinease passport only waiting for your answer.