Time flies quickly, and it is now the fourth year that the new civilization has stayed on this planet...... The entire fleet can't wait to start preparing for the next trip.

Four years, compared to the entire universe, is just a short moment, but for the human beings in the Kunlun Mountains, it is a lot of time and can do a lot of things.

At the beginning of the fourth year, about 110,000 people, aboard a large transport spaceship "Pelican", left the star field and returned to their rear base camp. This population figure is 10,000 fewer than expected.

And now, the day before the departure again, the entire fleet has changed dramatically.

The damaged parts of the war have been completely repaired, and new magnetic field generators have been added to the exterior, that is, a voyage that is sufficient to achieve higher speeds and travel longer distances.

At the same time, the internal defense measures were completely reorganized, and the weapons in the outer military corridors were all updated. Not just some automated defensive weapons, but also some additional military fortresses, which can also be defended for a long time if the next information paralysis is encountered.

In particular, the entire network system is divided into five levels of security.

The first-level network is the civilian network, the second-level laboratory network, the third-level military network, the fourth-level emergency communication network, and the fifth level is the network system represented by Pangu Brain.

Each layer of the network is isolated from each other and has very strict security measures.

On the other hand, as the deadline for this rectification is about to be reached, all kinds of material resources are arranged to be full in the warehouses inside Kunlun Mountain, and they have gradually tended to be saturated......

Zhang Yuan himself is too busy!

Seeing boxes and boxes of gold, platinum, and silver being transported up by the space elevator, all of which were truly high-purity finished products, he had a magical pleasure like a miser!

Mankind...... Sure enough, it's a visual animal, and it naturally likes these shiny things.

Well, gold and silver have long been not the so-called general equivalents, but they are good industrial goods.

The new humans could even be so extravagant as to make wires out of silver. Although superconducting materials are available, ordinary wires still exist from the perspective of cost and reliability.

Not only Zhang Yuan, but also ordinary citizens, everyone can see the endless flow of robots working under the space elevator, as well as boxes full of goods, and the mood can always become very good.

In particular, this planet, as a young planet, has mineable heavy element minerals on the surface, far exceeding normal terrestrial planets.

The reason for this phenomenon is ...... It's too young.

For example, the earth is actually not short of minerals such as gold, silver, and platinum, how much gold does the earth have?

Six trillion tons!

But how much does humanity mine from the earth?

Very little, about 120,000 tons, a paltry part of 500 million.

This is because, with the passage of time, most of the heavy elements gradually sink to the depths of the earth's core under the action of gravity.

Even at a level close to a third-level interstellar civilization, it is impossible for humans to dig up the gold in the depths of the earth's core.

Due to the scarcity of gold on Earth, people can only develop Mars and Mercury. In particular, Mercury will become a mineral planet and a heavy industry base in the surrounding solar system engineering system behind.

But this planet is different, due to the short time of birth, there are still many heavy metals that have not had time to sink to the earth's core, coupled with frequent volcanic eruptions, which will erupt minerals again.

A lot of precious resources are dumped on the ground like garbage, and it would be a sin not to take advantage of this opportunity to get a little more!

"Hey, Kunlun Mountain is not big enough, there is no tonnage. That's pretty good now. Zhang Yuan was sighing sadly, he felt like some kind of greedy creature in fantasy - a giant dragon, eager to inspect these mountains of gold and silver again.

And the large warehouse that is being inspected now is in a gravity-free vacuum zone, everyone is wearing power armor, and there are several assistants from the secretariat behind them, constantly talking about various data.

"The demand for gold in our entire civilization is not very large, mainly used in aerospace glass and personal jewelry, so the current reserve is 50,000 tons."

"And these uranium-235 raw materials, uranium hexafluoride, have been purified and can be used in fission power stations, as well as in the manufacture of radioactive batteries...... Oh, and there's the creation of electromagnetic cannonballs, which produce fission explosions and cause radioactive contamination when they hit the target, which is better than nothing......"

"The current reserve is 120,000 tons."

"The reserves of helium-3 are even larger, and it is the main nuclear fuel."

It is the natural nature of human beings to love wealth, and these young people in the secretary department, as they talked, their faces inexplicably turned rosy, as if they themselves were billionaires.

“…… Oh, and there's plutonium-239, a by-product of breeder reactors that can be used to make batteries. The reserve is about 200 tons. ”

Plutonium-239 is transformed from uranium-238, that is, after uranium-238 is put into the reactor for irradiation, it absorbs one neutron and becomes uranium-239, and then releases two negatively charged electrons, so that the number of 92 protons increases to 94, and the element position advances by 2 places, and the property changes to plutonium-239.

The reason why these radioactive minerals are also needed is not only for weapons, but also for the safety of the spacecraft. Nuclear fusion, after all, is a complex energy source that cannot be used with the slightest interference. Nuclear fission is much simpler, and the existence of two power systems can better ensure the energy supply of the spacecraft.

"That's basically the end of the supplies in these warehouses......

Zhang Yuan listened to these reports, and was in a very good mood, after inspecting these material reserves, the last thing was completed, and the Kunlun Mountain fleet would set off again tomorrow and leave this planetary system without an owner.

He suddenly thought of something and asked, "By the way, those biologists, have you found the most primitive life on this planet?" They've already searched a lot of craters, haven't they found anything? ”

"Your Excellency, I'm sorry, but not yet." Dr. Li replied: "Our drone dug up some soil specimens in different craters, and there were some complex organic matter in them. ”

"But judging by it, it's not really life yet. If you want to truly evolve life, 400 million years is too little, and it may take another seven or eight billion years. ”