I am interested in the intelligence of the ancients, in building a building that looks at the layout with consideration of the changing seasons and the sun, I think it's amazingly clever, and the problem of changing the king's status in the choson dynasty is interesting too, perhaps because part of the choson dynastic diplomacy of friendship china in ancient times. And finally they call the king back as emperor .., thanks for sharing knowledge of korean history .. Very interesting.. @slowwalker