For the past several years, the exterior of the Shinsegae Department store has been turned into an animated Christmas display that may be the best in the world. Inside, the atmosphere is so exclusive that one probably needs a billion won in the bank to feel comfortable shopping. In the distance, the N Seoul Tower was lit green. It is lit Sky Blue when the level of fine dust is below 45 micrograms per cubic liter, so this day had more dust than desired.