Behind the rock wall is a passage that runs vertically downward, so long that there is no end in sight.

What to do?

If you jump, you will definitely die. Even if he wears the Colorful Battle Armor, Chu Tianjiang will fall to pieces, because the Colorful Battle Armor has no flight function.

Just when Chu Tianjiang was at a loss, a round metal plate rose up from the passage.

"Stand up."

"Stand up!?"

"It has spotted us and is taking us in now."

"Not a trap?"

"No, it has no malice." The figure replied in the affirmative. "It seems that it knows you and knows who you are."

"What?"

"At first, its detection system collects your genetic information. If it's made by Clara and Natasha, then surely you know. ”

Chu Tianjiang didn't say much wordy, took Iska's hand, and nodded at her.

The two found the round metal plate.

Obviously, this is an elevator.

Iskar clenched Chu Tianjiang's hand and asked Chu Tianjiang to pay attention to the metal plate under his feet. Iskar had discovered that it was a metal plate made of manya steel.

The metal plate kept going down, and soon left the passage.

Entering the interior of the building, Iska immediately became dumbfounded. Although Chu Tianjiang was also extremely surprised, he controlled his emotions.

The building is very large, a huge spherical space, with a radius of about five kilometers.

The passage that Chu Tianjiang and they entered was only one of the thirty-four passages on the ball wall, and these passages were not entrances and exits, but more like some kind of equipment.

Although it has been abandoned for thousands of years, it can be seen that it was once thriving.

"It's a man-made space, or a man-made ecosystem."

"What do you mean?"

"Look out for those plant fossils on the bulb wall." Because Chu Tianjiang didn't wear the colorful battle armor, the figure couldn't let Chu Tianjiang see the image. "Previously, there was an artificial gravitational field here, or something else similar to a gravitational field, maybe a pressure field. The pressure point is in the center of the sphere, which is the white bright spot you see now. That's also the light source, providing light to the plants here. ”

Chu Tianjiang looked down, and there was indeed a white bright spot there.

At this time, Chu Tianjiang also figured out what was going on.

It is a closed ecosystem, and through technological means, a physical environment similar to the outside world has been created, except that the inner walls of the sphere have become the surface.

The creation of this man-made ecosystem requires not only strong industrial power, but also very advanced science and technology.

This is also a relic of the Shadow Empire!?

If so, then the Shadow Empire must be very powerful, with a very glorious history, and has mastered very advanced science and technology.

After getting closer, Chu Tianjiang realized that it was not a white bright spot, but a sphere with a diameter of about ten meters.

"Don't be fooled, it's just a virtual three-dimensional projection image."

"What?"

"What you see is just a virtual projection. Previously, there should have been an energy device that provided the plants in the biosphere with the light necessary for photosynthesis. It is an energy body energy, that is, the energy body is directly converted into energy, which is more advanced than the technology we have mastered. ”

"This ......"

"The energy bodies are almost depleted, and they can no longer produce light for plants to photosynthesize, so they can barely maintain a central control system."

It was also at this time that the circular metal disc entered the interior of the white sphere.

As the figure said, there was only a faint light source in the center, and the white sphere as blazing as the sun that Chu Tianjiang saw was just a virtual image.

"Hello."

The sudden sound startled Chu Tianjiang. Immediately, an avatar appeared in front of Chu Tianjiang. The four dyes are also virtual three-dimensional projections, but seeing the face of the avatar clearly, Chu Tianjiang was stunned for a moment. It's Clara, the Clara that Chu Tianjiang is most familiar with.

It was at this time that Iskar collapsed on a circular metal plate.

"Iskar ......"

"Don't worry, she just passed out." The avatar floated over, "I don't know who she is, so I can't let her know what happened next." ”

Chu Tianjiang touched Iska's neck, as well as his pulse, and his breathing was also very smooth, and then he was relieved.

"Come out too, I've been waiting here for five thousand years."

The figure appeared beside Chu Tianjiang and did not continue to hide.

"Clara and Natasha made you?" The figure raised a question for Chu Tianjiang.

"You can say that, but it's not entirely true." The avatar replied in the affirmative. "I've been waiting for five thousand years, and as far as I know, I'm the only sapient being that has survived to the present."

"Unique?"

"Five thousand years ago, Clara and Natasha created a total of ten artificial intelligences like me, giving us a common mission."

"What mission?"

"Wait for him to return." The avatar glanced at Chu Tianjiang.

"Can you change your appearance?" Chu Tianjiang couldn't stand it a little, even if it was just a virtual projection.

"Yes." The avatar takes on the form of Natasha.

Chu Tianjiang rolled his eyes, obviously this artificial intelligence was not very smart.

"Don't show up as someone he knows." The figure reminded the avatar.

After changing again, the avatar became a person that Chu Tianjiang didn't know.

"Alright, let's get down to business. I'm running out of energy, and I'm running out of time. ”

"What is your mission?"

"Do you want me to start at the beginning?"

Chu Tianjiang and the figure nodded at the same time.

"In that case, we have to start at the end of the era of calamity."

At this time, the metal plate next to Chu Tianjiang rose up and formed a chair. Chu Tianjiang was not polite and sat down on the chair.

At the end of the Calamity Era, Clara and Natasha did not go to the underground city, so they did not follow Zhang Xiaogang and the underground city they established to fall together. Although they survived, there was a problem, that is, they didn't know that Zhang Xiaogang had found Chu Tianjiang, and Luo Jinyong had created a subspace to protect Chu Tianjiang's body and wait for Chu Tianjiang to return.

After the fall of the underground human civilization, Clara and Natasha spent a lot of energy building the Shadow Empire.

It's just that they urgently need to solve a problem, that is, Chu Tianjiang's consciousness, or after the soul returns, needs a body.

The problem is, it's not easy to do.

Although Natasha recovered her memory and knew where Zhang Xiaogang hid Chu Tianjiang's body, the geological changes completely changed the face of the earth. Finding the hibernation pod, which is similar to a coffin, is more difficult than looking for a needle in a haystack, and it is simply impossible.

In addition, there is a very serious problem: the almost ubiquitous genetic virus.

Even if you rely on antibodies, you can ensure that Chu Tianjiang will not be killed by the gene virus after returning, but the antibody cannot prevent Chu Tianjiang from being infected by the gene virus. Melanie's research has shown that people infected by genetic viruses have a hard time gaining superpowers through other means. In long-term research, Clara and Natasha found scientists who also proved that only people who have not been infected can gain superpowers through genetic modification.

In other words, Clara and Natasha want to create a space for Chu Tianjiang that is free of genetic viruses.

This is also the direct reason why they built a fully enclosed biochemical laboratory.

Of course, there is another reason, that is, when necessary, clone a body that can allow Chu Tianjiang's soul to attach, so that Chu Tianjiang can return to this world.

"This is your mission?"

"The initial mission, but also a few secondary missions." The figure showed a three-dimensional projection image in front of Chu Tianjiang. "By the time I was built, other scientists had already found a way to fight the genetic virus, and even kill it entirely. If the genetic virus can be completely killed, the atmosphere can be purified and the ecological environment can be restored, and naturally evolved species are needed. To this end, I was given a second mission, to allow all kinds of organisms to evolve naturally in an environment free of genetic viruses in this closed ecosystem. When that day comes, these naturally evolved species will flood the entire planet. ”

"And then?" Chu Tianjiang did not continue to dwell on this issue.

"I'm endowed with a very high level of artificial intelligence and have the ability to operate completely independently. The base has complete supporting facilities that will allow me to run for thousands of years. ”

"Why do you want to design like this?"

"It's a secret base, as are the other nine. After the construction was completed, all the construction workers were erased, and there were only two people who knew that we existed. ”

"This ......"

"The destruction of underground human civilization is a very painful lesson, and all human resistance is insignificant in the face of invaders. Although I am just an artificial intelligence, I don't know what Clara and Natasha think, but with the progress of science and technology, the Shadow Empire will sooner or later become the second underground human civilization, and it is only a matter of time before it falls. As long as it is related to the revival of human civilization, it must be kept strictly secret. ”

The figure smiled bitterly, in this regard, the underground human civilization is obviously not good enough.

"Unfortunately, the Shadow Empire still fell, and all the scientific research facilities built by the Shadow Empire were destroyed when it fell."

"You saved it."

"I don't know what Lu Dao can preserve, maybe it's lucky."

"Lucky!?" Chu Tianjiang obviously didn't believe it.

"Of the ten closed ecosystems, I was the one that was built the most late, and the most complete, with a backup control system. To be precise, I'm the backup control system. It's just running synchronously with the main system, so I'm not at all different from the main system. ”

"This ......"

"When the blow comes, it is the main system that is destroyed. Programmatically, I went into hibernation for a thousand years after the main system was destroyed. ”

Chu Tianjiang was shocked again, this is indeed a very ingenious design.