The existence of the crystal wall hole allowed Zhang Nan to retain all his abilities, even in the material universe.

But this does not mean that Zhang Nan can do whatever he wants and freely.

He also found that once the distance exceeds 1 billion kilometers, there will be a few light particles that will disconnect and completely lose induction, and this probability is about 1%.

As for the rope of faith, once the distance exceeds 1 billion kilometers, the probability of the rope of faith breaking will increase to about 10%.

The further the distance, the higher the probability of disconnection.

So after the Dream Home, after shattering through the crystal wall hole and successfully blocking the influence of the divine realm, Zhang Nan ordered to slow down and stop moving forward.

I stayed at a distance of about 500,000 kilometers from the hole in the crystal wall, and didn't go too far.

And this place is not too far from the residual core of Blue Star, only about one million kilometers.

It will be stopped here as a transit site, and it will also facilitate the implementation and implementation of the Blue Star Reconstruction Plan in the future.

So, what is the first thing to do when returning to the universe in my hometown?

adapt.

First adapt to the living environment under zero gravity in outer space to solve some problems encountered on space cruise ships.

For example, if something leaks and needs repair, repair it immediately.

Or there is a problem with the ecosystem system, which leads to higher or lower oxygen content and higher toxic gas concentrations caused by decoration, so it must be dealt with.

If the temperature on some areas on the boat is too high, then cool down.

If the temperature is too low, then heat up.

The hull was hit by a small space meteorite, and a high-power laser cannon must be installed to destroy the threatening space meteorites that evaporate near.

The high-energy radiation in the universe is too strong, so space cruise ships need to be powered and fluxed to form a "magnetic barrier".

Wait and wait.

Due to too many outbreaks, sometimes thousands of problems have to be dealt with every day.

Half a month later.

The crew members eliminated all the loopholes and hidden dangers on the Dream Home, and finally entered a stable operation state, basically solving all the problems.

Then.

Bridge conference room.

Zhang Nan held a meeting with experts to discuss how to rebuild Blue Star.

"How to rebuild Blue Star? I have been studying this project for almost twenty years, and now I finally have my place to use it."

Su Hesheng, a coach with many white hairs on his head, couldn't help but dance and said excitedly: "My plan can shorten the reconstruction period of Blue Star to less than three hundred years, which can be called the "Three Hundred Years Reconstruction Plan".

"The first step is the soil filling plan. The soil raw materials needed for reconstruction of Blue Star can be dug and shipped from the endless wasteland west of the New Xia Continent with a large amount of radiation-free soil, and then placed on the Blue Star residual core."

"The soil mass we need to fill is about 20 trillion tons. Using 100,000 giant heavy-duty spacecraft, each shipment of 1 billion tons is shipped. On average, each heavy-duty spacecraft runs about 100 million times to complete the soil filling mission."

"In fact, if 200 million tons of soil are loaded into giant cargo boxes, and then the heavy-duty spacecraft accelerates the cargo boxes to a certain speed, aim at the Blue Star Remaining Nuclear Delay, each spacecraft can target at most about ten per day."

"Even so, it will take more than 5,500 years to complete the soil transportation task. This efficiency is obviously too low, and the transportation efficiency must be increased fifty times!"

Fifty times increase?

Zhang Nan felt shocked.

It is extremely exaggerated to transport tens of trillions of tons of soil every day. I didn’t expect that this was not enough. It had to be increased by fifty times. How to do it?

"Electromagnetic catapult."

Expert Su Hesheng continued: "Build a hundred giant vacuum pipeline ejection devices, and launch 51.84 million giant cargo boxes every day at the crystal wall hole at a speed of six per second. In the solar system universe, a large number of spacecraft are arranged to adjust the flight speed and direction of the giant cargo boxes, so that they can go towards the residual core of the Blue Star... In this way, the first step of the task can be completed in just over a hundred years."

"The second step is to create the atmosphere and luck. If the atmosphere air can also be extracted, compressed and transported from the New Xia Continent. It only takes 6000 trillion tons to transport, which is just a transport volume of less than a day. As for water, we can tow Jupiter's moon Io 4 with more than one million heavy-duty spacecraft, with a huge net, cover Io 4, and then drag it to the vicinity of Blue Star. Finally, all the water resources on Io 4 are drawn to Blue Star to form a new ocean."

"After the moisture was drained, the remaining wreckage of Iopa 4 is still the size of a moon star, so it can be left in the orbit around the blue star and become a new satellite to replace the original position of the moon star. It can be called the 'new moon star'."

"After completing the first two steps, the third and last step is to slowly restore the natural environment of Blue Star, let all kinds of plants grow on the surface, fill the earth and the ocean with life, and let the Blue Star home carry tens of billions of people and allow human civilization to reproduce on it."

"At that time, the total surface area of ​​Blue Star was about 600 million square kilometers, land accounted for 1/3 and ocean accounted for 2/3. The environment was very comfortable, and it was as beautiful as a picture scroll, with basically zero pollution, and it would be rebuilt to the most perfect state."

"Although three hundred years is long, it is definitely worth the huge price and effort we have paid for this to accomplish this."

After listening to Su Hesheng's words.

Zhang Nan's brow frowned.

Three hundred years, isn’t this a bit too long?

Can it be shortened to about thirty years?

Also, is it too far and trouble to transport soil from Xuanmeng Continent (Xinxia Continent)? In fact, there are a large number of meteorites and satellites around the residual core of Blue Star. According to experts, the total mass is about 10 trillion tons.

The mass of Mars is about 6 trillion tons.

Plus Jupiter's multiple moons.

Why don’t you use high-power giant nets to "stuck" these meteorites and satellites one by one, then pull them to the residual core of the Blue Star, and then collide, fuse, and combine them together, and then get a complete version of the Blue Star?

The total mass is definitely enough.

The air is transported a little from the Xuanmeng Continent.

Enough water resources.

If it is as fast as possible, the first step will be completed in about ten years, right?

The most difficult first step is completed. Wouldn’t the next two steps be completed soon?

According to Zhang Nan's plan, it is entirely possible to complete the reconstruction of Blue Star within 30 years.

"Guozhu, I have thought of your plan a long time ago, it won't work like this."

Su Hesheng shook his head and said, "Meteorites and satellites in the solar system all contain a large amount of heavy elements and have a high average density. Converging these substances together will cause the earth's crust temperature to increase and the pressure to increase, so that magma is everywhere, which takes millions or tens of millions of years to gradually cool down."

"The only way is to use a large amount of lightweight soil with a density of less than 3 grams per cubic centimeter to avoid excessive temperature and excessive pressure in the earth's crust. It also requires good heat dissipation and cooling ability, does not contain radioactive heavy elements, and the metal content is reduced to avoid the occurrence of geothermal effects... So the best filling material is the soil on the endless wasteland, and no other substances can do it."

Using meteorites and satellite materials in the solar system, even if there is a way to cool down, the nuclear radiation intensity on the surface of the modified blue star will be so high that life cannot bear, and it will become a toxic planet that is not suitable for survival.

To achieve a "clean planet", you can only transport soil from the Xuanmeng Continent.

So, there is no better option when it comes to filling.

For water resources, you can use ice water on Iopa 4, or take radioactive water from the endless sea in the New Xia Kingdom - it is also the latter's option.

"Understood."

Zhang Nan nodded.

In addition to the rich content of heavy elements in the solar system, the rest is better for human survival, and for the sake of humans, it is all the things on the Xuanmeng Continent.

Although it is a bit inefficient and takes too long.

In order to rebuild a better home for humanity.

import.

Whether it is soil, air, water and other raw materials, it is best to import them from Xuanmeng Continent. All of them are imported goods, so you will feel more at ease and at ease.

This mentality can be called "respecting mystery and fascinating foreign countries".

"For the sake of cleanliness and safety, it's better to import them all. After all, hundreds of billions of heavy element mines have been mined in the Xuanmeng Continent, and it's time to come back to something now."

Zhang Nan thought about it and said that heavy elements are very valuable, but in the reconstruction of Blue Star, heavy elements should not be mixed with.

Then the only question is ahead.

How to speed up efficiency?

Accelerate the efficiency of transporting all kinds of materials from Xuanmeng Continent to the Blue Star Remnant Core.

At least 20 trillion tons.

How to achieve transportation within ten years.

That is, 2 trillion tons are transported each year.

Dividing by 360 days a year means completing a "small task" of 5.555 billion tons per day.

Is such an exaggerated and terrible quality possible to be completed in one day?

Zhang Nan turned his mind and began to rack his brains.

Tens of thousands of talented students who followed him also brainstormed and imagined various ways.

"How to transport it with a space ring? As long as you prepare 1 million space rings, the capacity is more than 10,000 cubic meters. If you fill it with soil, you can load 30,000 tons at a time, multiply by one million, that is 30 billion tons. You only need to run more than 18 million trips a day... Well, my plan failed."

"Can we make the diameter of the crystal wall hole bigger and expand the diameter to more than 10,000 kilometers, and then increase the number of giant electromagnetic vacuum ejection devices to more than 1,000 seats, and increase the ejection efficiency ten times, and the time can be shortened to about ten years."

"Building electromagnetic catapult devices is too troublesome. I think it's better to build a super spacecraft with a load capacity of 100 billion tons, build 100,000 ships, and run more than fifty trips a day, which will meet the transportation efficiency requirements?"

"No, these solutions are not possible! Whether it is building electromagnetic catapults or building super load-load spacecraft, the production and construction of these devices will take at least dozens or hundreds of years, which is not realistic at all, and it is not feasible."

"Teacher, I have a good idea here, it will definitely work!"
Chapter completed!