Fascinating though, pipes that ran into the mountain and into the salt sea... industrial technologie from a few thousand years ago.
Maybe they produced salt there..,based on hydropneumatic concepts, tubes and a hill big evaporator.
A single fascility, invented by one person ,unique in the world.
That the scientists vanished is a promising prospect somehow imho.
On the other hand maybe...
Did you notice.. ,the chineese look somehow simmilar to the Grey`s if you project their physical properties into the future??,.. who knows.