Just like the various examinations and tests on Earth thousands of years ago, the alien invaders used various forms of tests to select higher-quality beings from this group of relatively high-quality humans and their descendants.

The genetically modified humans in the world tree that Shi Wanyun climbed were those who had passed the second level of selection.

But the selection is not over yet.

The humans who passed the second round of selection are like the students who passed the college entrance examination and were admitted to university thousands of years ago.

Still not up to quality standards.

Thus, in the world tree that looked like a university thousands of years ago, a new round of selection began.

The third level of selection.

The status of humans who have entered the World Tree is determined by the degree of success of the genetic mutation.

The three levels of selection are closely linked.

What is most surprising is that these three levels of selection are mostly carried out by humans themselves.

Almost all humans who have gone through these three levels of selection have never seen the real manipulators behind the scenes, those alien invaders.

These people even believe that after passing these selections, they can get close to those alien creatures whom they believe to be gods, and can... return to their hometown, Earth.

They don't know that they are actually standing on the earth.

Perhaps the selection is not over yet.

No one knows whether humans who pass the third level of selection will go through the fourth and fifth levels of selection.

But what is certain is that the selection is not over yet.

after all……

As the controllers of this selection, those manipulators behind the scenes, those alien invaders, have not yet intervened.

The alien invaders have the final say on what purpose the humans who are finally selected will be used for.

Xu Xin finished speaking.

Shi Wanyun was no longer in deep fear, but looked at him with a very complicated expression.

Confusion, doubt, shock, disbelief, and...

Thinking and a hint of enlightenment.

"What...are you talking about? Alien invaders? We're still on Earth?"

Shi Wanyun still asked. She grabbed Xu Xin's arm and stared at him intently: "You said just now, was this just a guess? Or did you already have evidence?"

The panic and confusion in her heart now overshadowed the fear in her memory.

In fact, the guesses Xu Xin just mentioned basically coincide with hers.

Besides the conjecture background.

In her mind, this was not the Earth a thousand years later, but another planet, or even another world.

The mastermind behind all this is not an alien invader, but the monster she saw... the one that almost caused her mental breakdown.

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Thinking of this, the image of the monster appeared in her mind again.

Then fear rose in my heart again!

She shook her head vigorously.

Now is not the time to think about these things!

She pursed her lips and looked at Xu Xin.

Now, she just wanted to know whether the background of the conjecture Xu Xin described was also his conjecture.

It's still true.

"What do you think? Do you think what I said is true?" Xu Xin asked back.

"Is it true...?" Shi Wanyun murmured.

"Have you never had any guesses about this world?"

"Of course I have."

Shi Wanyun's hand, which had been tightly grasping Xu Xin's arm, slowly loosened and fell limply on the bed.

She whispered, "Everything here is too similar to Earth. The ecological environment and biological species are very similar. Coupled with the initial data and prompt sounds, I initially thought this was just a very realistic virtual world, and we were just a group of people who fell into a deep sleep."

"Do you think so now?" Xu Xin asked.

"Of course not." Shi Wanyun shook her head. "Because the feeling is too real, I have been trying hard to find flaws in this regard, but in the end, my result is that this is a real world."

"This can't be a fake world. If a fake world can be so real, indistinguishable from the real world, then... it's no longer a fake world, but the real world."

"So, I began to change my thinking. This world might be a parallel Earth, or a planet created based on Earth's ecology."

Shi Wanyun looked at Xu Xin with a complicated look in her eyes: "When I saw that monster, I was actually more inclined to the latter."

"This is a planet created by an advanced intelligent species, imitating Earth's ecology. Or perhaps it's the other way around, the Earth we once lived on was actually the imitator, a scaled-down version of this planet."

Ah, this...

Xu Xin was a little stunned after hearing this.

This woman's imagination is not ordinary...

Although he had thought about these various possibilities, those thoughts basically just flashed through his mind.

"But now, you've given me another possibility." Shi Wanyun's eyes trembled slightly. "Is this... Earth a thousand years from now? Have you... obtained any evidence?"

She did not question Xu Xin.

"Evidence..."

Xu Xin was still hesitant about whether to tell her the truth, whether to...

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