Eleven days to complete a structure, Yu Nan also has to set up energy facilities and underground gravity facilities, here is only one-sixth of the earth's gravity, normal people are not suitable to live here, fortunately Yu Nan has anti-gravity technology, the same technology can be used to strengthen gravity.

To do a good job in the energy and gravity system, it is necessary to install an artificial solar system for this facility, and at the same time, Yunan will also lay millions of tons of fertile soil here to build the foundation of the ecological garden, transplant all kinds of plants, and ensure a small biological ecosystem, even with the assistance of a large number of robots, Yunan is only busy with one or two hours of rest every day.

There is also a water recycling system on the surface of this biosphere, fed by two separate water towers and simulated natural water circulation and sewage treatment plants, and the canals surrounding the entire area are as close as natural streams as possible.

For a whole month, when Yu Nan hatched the little creatures and released them into the ecosystem where the vegetation had grown, it was already very comfortable.

This ecosphere only ensures that the base has a normal living environment, and the real test site is still under the ecosphere, and the shield machine continues to dig more than 100 meters underground, and inside is a special laboratory that presents a cross structure that can close any exit.

After completing all this, Yu Nan returned to Raccoon City, asked everyone to change into protective suits, and used Pym particles to make everyone smaller, and at the same time eliminated all traces in the hive, before Yu Nan led them to the moon base.

When Yu Nan made Alicia and the others bigger, looking at the spring scene of flowers, birds, fish and insects everywhere, Alicia looked up in shock and dragged Yu Nan and said:

"Yu Nan, this is the moon base you built?"

Yu Nan pointed to an elevator out of the base not far away and said with a smile:

"I don't believe you can go up and take a look, I have an observation hole at the exit, and I can see the starry sky outside, but here is the far side of the moon and I can't see the earth."

"It's beautiful, but why do you have so many plants and critters here?" Alicia said with a sweet smile.

This ecosphere is only the first one designed by Yu Nan, and now the shield machines are being excavated in other directions, and the crater where the base is located is extremely deep, and he intends to build a network of ecospheres here, at least dozens of ecospheres are connected to each other, so that he can simulate the complete ecological structure of the earth.

To build an ecosystem, of course, biological embryos and plant seeds must be complete, fortunately, there are several institutions on the earth that specialize in preserving various biological and plant samples, Yu Nan found a complete cryogenic warehouse to get these things, he didn't want to waste them.

"It's a subtropical setting, and it's set up with four seasons like spring, with 10 subtropical ecospheres and three simulated lakes in the east, 10 tropical biospheres and four different marine environments in the west, mountainous and hilly environments and simulated Antarctic ecoregions in the south, and ice and snow environments and the Arctic biosphere in the north.

Once all of this is done, you can start the simulation environment loop at that time, and there will be a more realistic feeling of survival here.

As for the origin of the biodiversity you mentioned, it is thanks to the scientists who have prevented the catastrophe of the planet, who have been preparing for decades to avoid the extinction of life on earth because of human beings. ”

A huge projection display map appeared in front of Yu Nan, except for the small ecological area in the central area, the others are often a huge ecological circle with a diameter of more than ten kilometers, but in order to complete such a large project, with Yu Nan's current technical strength, it is estimated that it will take several years to excavate and frame the dome structure.

However, Yu Nan believes that as long as he passes through a few more worlds, the scientific and technological power in his hands increases, and he has a large number of robots and more advanced equipment, it may not take long to complete this huge project.

Alicia watched those Alice clones frolicking in the biosphere, and her face showed a hint of confusion and looked at Yu Nan and said:

"Yu Nan, didn't you say that it was just a research base? Why do you go to such great lengths to create such a magnificent ecosystem? ”

Yu Nan sighed and said:

"You've seen the Earth almost destroyed by a single Resident Evil, right? If such a crisis occurs once, there may be a second, third, or more time;

You're just studying my genetic samples here, and once that's done, I'm going to stop any biochemical experiments here, and keep the ecological cycle alive;

If humans enter interstellar migration in the future, the model here can give them a sample, the ground cannot survive, and such an ecosystem can be established underground, and if the earth cannot survive, hundreds of thousands of people can be guaranteed to survive here. ”

Alicia nodded in agreement, as long as the human race is still reproducing, it will inevitably fight, even if this resident evil is over, those survivors are still fighting for living resources, if there is a crisis in the future, there is such a place, maybe it is the guarantee left by the human fire.

Yu Nan took Alicia to a man-made hill, clapped his hands on the mountain to open a passage, and took the elevator to the underground experimental area, Yu Nan reinstalled the facilities in the hive, and transferred the authority of the experimental area to the Red Queen and Alicia, but he left the biosphere alone to the surface of the moon.

There are huge mineral resources on the moon, which are available on the earth, and there is no shortage of them on the earth, especially helium-three, which is a high-level energy source, is stored in thick dust.

In order to protect the ark reactor in the biosphere, Yu Nan has released hundreds of mineral extraction and sorting vehicles since then, which can absorb dust from the ground, melt and centrifuge at high temperatures to obtain various pure metal blocks.

The best resource here is helium-three, and there are a lot of rare metals that can be obtained in addition, at least gold and silver.

However, what Yu Nan needs is helium three and some special materials for making high-end equipment, as long as a car is fully loaded, it will return to the storage area in the crater to unload, and then continue mining.

The surface of Yunan's mining vehicles has radar wave stealth ability, and the heat will not disperse, and on the far side of the moon with its back to the earth, any close satellites are detected by Yunan's probes, and the stealth system of these mining vehicles will also be turned on to avoid exposure.

Of course, there are no moons in the lunar orbit at this time, and the mining vehicles are frantically collecting the surrounding resources, and Yu Nan came out this time to collect the materials in the warehouse.

After collecting the materials, Yu Nan returned to the ecosystem and handed over the hundreds of newly built industrial robots and hundreds of shield machines to the Red Queen, who also had to take out the dome components that had already been produced, so that the Red Queen could control the robots to dig and install them while he was away.