"this……"
Xu Ying hesitated.
"Is there any difficulty?"
"Well... there wasn't one before, but now there is..." Xu Ying rubbed her temples with a headache and looked at the stone statue outside the window which was not too far away.
She brought Li Wenxi to the human base in the underground world. She originally wanted to show Li Wenxi around and let her explore whether there were any minerals around. Then she would tell the rulers of this human base the location of these resources so that they would not panic.
Because she herself had some doubts as to whether the rulers of this underground human world might have any other ideas.
You know, the area where humans live now is indeed much larger than the original area.
Even though the Earth's overall expansion has increased its surface area by a hundred times, this area of activity is pitifully small compared to the Earth's overall size today, but...
Have those alien invaders really never discovered this place?
Thousands of years ago on Earth, even a very small uninhabited island would be visible under satellite surveillance.
However, the technology of the alien invaders is much more advanced than that of humans thousands of years ago.
Of course, if she were to ask whether this human base had been discovered, she would be more inclined to believe that it had not been discovered yet.
First of all, the humans living here have not been affected at all. If this place was discovered by alien invaders, would those bastards... allow so many humans to continue to reproduce?
Of course, the more important reason is that this is an underground world.
The overall height here is at most two to three thousand meters, and some areas are only tens of meters or even a few meters high. There are even some areas that are completely isolated and closed by stone walls.
When exploring this underground world, we cannot use convenient flying objects like satellites for observation.
The current underground world is somewhat similar to the deep seabed thousands of years ago. It is extremely difficult to explore, and the scope is greatly doubled. Even if the satellite technology of the earth humans a thousand years ago was more advanced, the deep sea was still a very mysterious place for them.
Therefore, there is a high possibility that the human base has not been exposed.
After all, the alien invaders did not delve too deeply into the underground world. Most areas of the underground world are dark and basically lifeless. Who would bother to explore such a vast underground world?
As long as the mineral resources discovered are sufficient for their use, there is no need for them to waste too much energy in the underground world.
So in her opinion, those alien invaders should now only use the underground world as a convenient testing ground to experiment and control the bloodline of giant beasts.
At the same time, the location of their human base is remote and basically cannot be discovered.
"But..." Li Wenxi frowned after hearing Xu Ying's words and speculated, "It's true that it's difficult for alien invaders to find this place, but that doesn't mean that the humans living in the underground world don't want to get out, right? Among a hundred million people, there must be some who yearn for the surface and the blue sky, right?"
Xu Ying bit her lip.
"...They've been thriving in the underground world for thousands of years. Furthermore, to prevent them from committing suicide en masse, we deliberately didn't bring down any documents related to the surface or the blue sky when we first brought them to the surface. They probably don't have any idea what the blue sky is now, right? Or even..."
Xu Ying's tone was a little unconfident, and she looked up at the prosperous scene outside the window.
This is the most prosperous city in human history today, and most people live a carefree life.
People's lives are relatively fulfilling, and there is no situation where people want to come out of the underground.
For most people, blue sky and white clouds are just a legend, just like modern people don’t want to see dinosaurs or saber-toothed tigers.
There is no such demand.
I am alive and well now, why should I go to the ground?
Can I live as comfortably on the ground as I do now?
Moreover, some works over the past thousand years have basically been popularizing the dangers of the ground, which has caused most people to have an extreme fear of the ground.
Not only do they not want to return to the ground, they even regard the ground of this planet as an area that is extremely unsuitable for survival.
The temperature difference between day and night can be as great as ten degrees, the sun can cause extremely harmful effects on the human body, extreme weather conditions can kill tens of thousands of people at a time, and there are all sorts of irresistible beasts and flying monsters, and...
The crazy alien invaders will slaughter them all.
Under the indoctrination of this idea, people living underground even believe that human beings' move to underground, a place very suitable for survival, thousands of years ago was the best decision in human history.
Xu Xin and Xu Ying, who were transferred underground for unknown reasons, became the saviors of mankind.
"But... that's just what ordinary people think, right?" Li Wenxi retorted. "Ordinary people do have a prosperous life and don't see any need to return to the surface. But the higher-ups who control this underground world have probably realized that its resources are depleted, right? At least, the resources they've already explored have been depleted."
Xu Ying was speechless.
This is also what she is most worried about.
The managers of this human world know best how long this underground world can last.
At that time, after Xu Xin and Xu Ying sent everyone underground, they specially selected several people who were in high positions of power on the ground at that time to implement centralized power.
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