Xu Xingchen took the ship girls to collect asteroid material in the asteroid belt and the Kuiper belt to build a mobile space base.

Most of the 10,000 ship girls who followed Xu Xingchen were led by Xu Xingchen to change careers and become scientific research ship girls, cooperating with the Yuanwang sisters to research and verify technology.

Based on the existing 1,000-kilometer-level planet warship as a framework, we will conduct in-depth research on the relevant super technologies for unlocking the last guide mission.

Use these super technologies to upgrade existing conventional warship combat equipment, so that all ship girls can continue to exercise and upgrade.

Build a 1,000-kilometer-level planet warship battle equipment as the target of upgrading other ship girls' combat equipment, as well as Xu Xingchen's current main combat equipment.

At the same time, using conventional methods, we will build warships in the asteroid belt and the Kuiper belt, including planetary warships and supporting conventional warships.

Xu Xingchen did not rashly build the ship girl, and did not even give birth to a child with the ship girl, because he was not sure what the ending of this time and space was.

Although the probability of direct death and disappearance should not be high, we should not be completely ignored. In addition, there is also the possibility of being distorted and mutated, and we should not be completely ignored.

The ship girl who has been brought in by herself has no choice but to continue taking risks with her. It would be a bit inappropriate to continue building a new ship girl here.

So Xu Xingchen's decision was to only build ordinary warships. Such ordinary ships would be gone if they were gone. At most, some resources were wasted, and resources were collected in this time and space.

Although there are only 10,000 ship girls, the current ship girls are not alone to some extent. With intelligent sub-equipment, a ship girl has the function of a hundred people.

Xu Xingchen spent almost fifty years to produce eight planetary warships with a diameter of 1,000 kilometers, and countless conventional warships.

Four engineering construction ships are the main force in the construction of planet-class space projects.

A scientific research and exploration ship, serving as a mobile technology research and development center.

A battle battleship serves as the escort and combat core, and is basically useless at this time, so one was built first.

Two production and collection ships collect and convert resources in the solar system. One of them serves as the logistics base of the entire ship girl team, and the other provides resources for the engineering construction ship.

Of course, these warships are classified in name only, but in fact they only have different functional priorities.

All warships have complete functions and can undertake tasks that other types of warships are responsible for when necessary, but they are not as professional as the corresponding types of warships.

After decades of continuous upgrades, the ship girls' combat equipment has all reached 10 kilometers of spherical warships or above.

There were sixteen ship girls who successfully replaced the planetary warships of a thousand kilometers.

After the three planetary warships were built, Xu Xingchen collected interstellar matter from the solar system according to the parameters of the ship's mother planet and tried to build artificial planets.

Metal asteroids are used as the core and rocky planets are used as the mantle and crust.

Colleagues who piled up enough substances into roughly spherical shapes, continued heating and pressurization to melt and shake the entire planet well, and finally cooled and solidified to shape it.

The bumpy and stumbling in the early stage of construction was followed by design errors and operation errors, and the construction was built halfway through and started again.

The key is that due to insufficient manpower, the entire project progress was very slow. It took almost forty years to complete most of the work of planet construction.

The size of this planet is equivalent to that of the mother planet of the ship, and its mass and surface area are 2.25 times that of the earth, but the ratio of sea and land is close to that of the earth.

At the same time, there is no overly huge continent, nor is it the archipelago terrain of the mother star of the ship girl, but relatively large small-scale lands, evenly dispersed in suitable medium and low-dimensional areas.

If formally built, the area of ​​land that is suitable for human life on the surface may reach about ten times that of the earth.

It has the conditions that a natural and livable planet has, such as suitable magnetic field strength, atmospheric composition, surface gravity, sea and land distribution, and resource reserves.

It also has unique characteristics of artificial planets, such as planetary reactors, planetary climate regulation and defense shields, planetary environment self-repair systems and other super technological products.

A planetary reactor is to build the entire planet into a huge natural reactor that can continuously generate various resources required for surface organisms.

The initial design needs were based on the human society on earth, so the traditional human industrial society needed all kinds of coal, oil and other resources, and will continue to be generated.

The target customers identified at the same time are Xu Xingchen and the Ship Girls, so they also designed a more special "Ship Girl Resource Mine".

Drawing a well at the right location will bring out the active energy solution. When digging a hole at the right location, you can take out the crystalline Yuanchu materials below.

Everything about this planet is carefully designed, and its livability is more than one order of magnitude higher than that of the Earth. It is simply a perfect carbon-based life planet.

But the premise is that it must be transferred to the habitable zone of a star and the final biosphere construction must be completed.

In order to avoid causing a huge impact on humans on Earth, Xu Xingchen did not move the planet to the orbit between Mars and Earth.

Now parked in the dark world outside the Kuiper Belt, it is held hostage by an engineering-building planet warship and does not cause gravitational interference to other planets, satellites, and asteroids.

Keep the opposite direction from the earth, strive not to be easily discovered by humans on earth, and of course it also maintains a continuous frozen state, and of course the biosphere has not been built.

Xu Xingchen named it Nuwa Star, indicating that she is a planet that can nurture life.

Thanks to Xu Xingchen's guidance, the speed of technological development on the earth far exceeds history.

After the war, fission nuclear power plants were soon popularized. After the 21st century, low-level nuclear fusion technology gradually matured, and the nuclear power industry was about to be fully replaced.

In terms of space exploration, humans have established space bases that are many times larger than the International Space Station, and even built a space research station that has been stationed on the moon for a long time.

Mars and Jupiter have already had long-term satellites, and there are already organizations preparing to explore the asteroid belt to try to capture asteroids containing precious minerals such as gold and platinum.

A scientific institution has launched detectors out of the solar system as in history, and has now passed through the Kuiper belt, but is still far from the Olt Cloud.

If they walk out of the Ort Cloud, they will appear directly on the other side of the solar system at the moment they leave the solar system and enter the solar system again.

This solar system is a closed cycle of time and space. Xu Xingchen originally arranged for the ship girl to go to the border test and repeatedly tested this result.

After confirming this, Xu Xingchen was a little panicked. If he couldn't get out of here in the future, he would live in such a cycle of time and space, wouldn't it be very sad...

Five years after completing the construction of the planet, Xu Xingchen, who had lived in this world for eighty years, once again summoned all the ship girls.

Outside the Kuiper belt, eight planetary warships gathered, carrying thousands of conventional spacecraft, orbiting the semi-finished livable planet Nuwa.

Xu Xingchen sat in the command room of the hull of Yuanwang No. 7, watching the time and space sync countdown finally return to zero, and the picture in front of him suddenly twisted.

Dense and messy scenes came one after another and appeared out of thin air in Xu Xingchen's mind.

At the same time, some familiar system prompts also appeared directly in my mind.

"The returnees completed a parallel space-time experience, and the interference with the history of native civilization is being synchronized. The results after synchronization are as follows."

With this prompt, the chaotic pictures became orderly, and according to a very obvious timeline, they formed a dynamic corridor from far to near.

Xu Xingchen felt that his consciousness had become a spot of light, floating in this illusory and real corridor, and could directly see all the pictures around him.

You don’t need to move, the entire corridor will automatically translate backwards, and the surrounding pictures will enter your own vision and mind in turn.

That is the final result of the history you interfere with and merged with the original history.
Chapter completed!