Lu Tianyu bought Blackreef Island in the Central Pacific Ocean for 17 million star dollars, speaking of which this huge amount of money is also thanks to the mercenary group, if it weren't for stealing hundreds of millions of star dollars from the mercenary group, he really wouldn't have the money to buy the island.

When the receptionist took Lu Tianyu to arrive at Black Reef Island by seaplane, Lu Tianyu fell in love with this island at first sight, speaking of which the previous buyer's vision was really good, not looking at the area of the island, the scenery and beaches on this island alone are more than 20 million star yuan in other places.

On a high slope at the southernmost tip of Blackreef Island, there is a European-style castle, although it is full of dust, and the interior decoration has also withered because no one takes care of it, but it can still be vaguely seen that the decorator has good taste and the money and energy spent, all of which belong to Lu Tianyu from now on.

After introducing the entire island, the receptionist dropped a business card and left in a hurry, as if he was afraid that Lu Tianyu would suddenly regret it.

Until the seaplane in which the receptionist was riding disappeared below the sea level, Lu Tianyu released his central wisdom brain and said, "Are you still satisfied here?" ”

The Central Wisdom Brain Light Cluster rose into the air, and after a few dozen breaths, he returned to Lu Tianyu and said, "The geographical environment here is very good, and a large base can be built. ”

Lu Tianyu doesn't care about any large-scale bases, and looking for a new home for the Central Intelligence Brain is also for the gene therapy warehouse, "Can you put the construction of a gene therapy warehouse in the highest priority!" ”

"No way!"

The Central Brain replied bluntly: "Only after building a large base first and restoring the complete fourth-level technology can we create a gene therapy warehouse!" ”

Lu Tianyu is right to think about it, without a complete fourth-level technology, it is impossible to create an advanced gene therapy warehouse, and even if it can be manufactured, it may not be able to cure his sister's illness, and this matter really can't be too urgent.

"Oh well! What else is needed now, I can find it from other abandonments! ”

"No, you don't!"

There are a lot of good things in the central brain space, but most of them are closely related to the operation of the city, subject to their own authority, and they don't know what other good things are.

Two humanoid robots appeared in front of Lu Tianyu and began to help Lu Tianyu clean the castle, and then Lu Tianyu came to the open space outside the castle according to the instructions of the central brain, a huge machine with a diameter of about ten meters stretched out from the space of the central brain, one head plunged into the ground, and the other end was hidden in the storage space, like an earthworm magnified countless times, and began to drill down in front of Lu Tianyu, about thirty minutes later, the nearly 100-meter-long machine completely drilled into the ground, and Lu Tianyu didn't know what to say.

"This is an engineering robot bug!"

While explaining, the central wisdom brain sketched out a set of grand engineering drawings in Lu Tianyu's mind: "The seabed here is rich in fierce nodule mineral deposits, which can meet the needs of the most basic large-scale base construction materials, and at the same time, there is an inexhaustible light element fusion --- deuterium in the seawater, which can provide the base with primitive primary clean energy, with these two mineral deposits, it will take a year to build a large-scale submarine base." ”

Lu Tianyu learned in geography class that the earth's seabed is rich in nodules, which is a mineral deposit with very high economic value, with a total reserve of about 3 trillion tons and distributed on the seabed of 2,000 to 6 kilometers, of which the North Pacific Ocean is the most widely distributed, accounting for more than half of the reserves, about 1.7 trillion tons. Where manganese nodules are concentrated, there are more than 100 kilograms per square meter of area, which is literally spread on the seabed one by one.

Moreover, more than 50% of the nodule ore is iron oxide and manganese oxide, and it also contains more than 20 elements such as nickel, copper, cobalt, molybdenum, titanium, etc., which is enough for human use for thousands of years.

Needless to say, nuclear energy mainly includes the fission of heavy elements and the fusion of light elements. The fission of heavy elements such as uranium and the fission of light elements such as deuterium are abundant in seawater, but the reserves of deuterium are more, which is safer, cleaner and pollution-free.

The amount of deuterium in seawater is 1 part per 100,000, i.e. 0.03 grams of deuterium per liter of seawater. This may seem like a trivial number. However, it is this tiny amount of deuterium that produces enough energy to produce as much energy as 300 litres of gasoline during nuclear fusion. What's more, the total volume of the ocean is 1.37×1018 cubic meters, and a little calculation shows that the total reserves of deuterium in the seawater reach tens of billions of tons, which is so large that it can provide people with energy consumption for hundreds of millions of years. In addition, the extraction method of deuterium is simple, the cost is low, and the operation of nuclear fusion reactors is very safe.

The earth has entered the federal era, whether it is the mining of nodules or the use of deuterium in seawater, the technology has been very mature, but it is not very easy to mine on a large scale, subject to the problem of economic efficiency, businessmen are more willing to go to outer space to catch meteorites, or mine helium 3 on the moon.

Lu Tianyu looked at the huge base in his mind with bull's eyes, and was shocked beyond measure, he could only sigh that the central wisdom brain was a loser, and he really didn't understand why he wanted to build such a large base, it would take at least ten years to complete it, this is still calculated based on the scientific and technological level of the Martian civilization, if it is replaced by the current scientific and technological level of human beings, it will not be possible to do it in a hundred years.

"What will such a large base do in the future? So what about security? ”

Lu Tianyu roughly estimated that the length and width of the base for the construction of the Central Intelligent Brain reached 100 kilometers, and the height was also 4 or 5 kilometers, which was already equivalent to a super-large city in the alliance.

What worries Lu Tianyu the most is the safety issue, such a behemoth is placed on the bottom of the sea, it is impossible not to be discovered by humans, and it will not be possible to fight a world war with humans at that time.

"Your Highness, this is only a medium-sized base, if you want to restore to the level of fourth-level scientific and technological civilization, there is no medium-sized base that can't do it at all. And the base also needs to have a security guarantee, with a city-level starship to establish a protection system, it needs to occupy one-third of the base area, as for the security issues considered by His Highness, there is no need at all, any ship close to the base will be disturbed, and there is no need to worry about being discovered by humans. ”

"Wait, why build a city-level starship, and what kind of spaceship is a city-level starship?"

Lu Tianyu was completely stunned by the Central Intelligence Brain, he didn't have a plan to build a starship, and he really couldn't figure out what to do with the starship?

"The city-level starship belongs to His Highness's ship, according to His Highness's S-class authority, a provincial-level starship should be built, but now the resources on the earth are insufficient, and the largest starship that can be built can only be at the municipal level!"

Lu Tianyu quickly read the information about the Martian civilization warship in his mind, different from the starship classification on the earth, the Martian civilization warship is divided into village-level, township-level, county-level, municipal-level, provincial-level and national-level, and then there are continent-level, planetary-level, stellar-level, galaxy-level, and river level, the river class is the largest combat starship known to the Martian civilization, but after reaching the galaxy class, the size of the starship does not increase but decreases, but the combat effectiveness is increased by hundreds of times, it is said that it is caused by accommodating one or several stars as a power source inside the starship.

The village-level spacecraft is about 30 to 50 meters in diameter and is the smallest interstellar combat warship, with three electromagnetic railguns on board, equipped with 500 biochemical fighters, or 100 robots; The township-class spacecraft is 80 to 100 meters in diameter, carries five large electromagnetic railguns and a small energy cannon, and is equipped with 2,500 biochemical fighters, or 500 robots; The county-level spacecraft has a diameter of 500 meters, carries five large energy cannons and a particle annihilation cannon, and is equipped with 12,500 biochemical warriors, or 2,500 robots, and the city-level spacecraft is usually about 1,000 meters, which is a small and medium-sized interstellar spaceship in the Martian civilization, carrying twenty large weapons of various kinds, and equipped with tens of thousands of biochemical fighters, or corresponding robots.

A complete municipal-level starfleet includes one municipal-level spaceship, ten county-level spaceships, one hundred township-level spaceships, and a thousand village-level spaceships, of which there are as many as 2 million biochemical warriors, or millions of robots.

Such a large number of spaceships made Lu Tianyu dizzy for a while, and he really couldn't imagine that the lowest-level fleet of a prince would be so huge, and if it was configured according to the provincial scale, the number would reach what kind of number.

Lu Tianyu already has a preliminary understanding of the Martian civilization Zhi Brain, and he can't make modifications to the Zhi Brain program before obtaining SS-level permissions, that is to say, what Zhi Brain wants to do now is a pre-set program, and he has no other choice but to accept it.

Above the SS level, there are SSS level and imperial power level, SSS level is a special level, mainly the prince and the generalissimo can have, but the prince and the generalissimo are usually not set, the highest level that the royal children of the Martian civilization can obtain is the SS level, only before the old emperor is about to die or abdicate, the prince will be established, as for the generalissimo, it will only be temporarily appointed during the war, not a permanent position.

You don't have to think about the imperial level, this is a special level for the emperor, don't even think about it.

It's just a complete city-level starship formation, including ten county-level spaceships, one hundred township-level spaceships and one thousand village-level spaceships, and finally a special transportation starship, the number has reached 1,112, so many starships can compare to the combat power of an interstellar combat group on the earth now, and there are only twelve such interstellar combat groups on the earth.

If you finally consider the fourth-level civilization technology bonus, the actual combat power of these starships in the end, I am afraid that when the construction of my city-level starship formation is completed, I am afraid that it will be able to crush all the starships on the earth.

Lu Tianyu no longer knows what to say, does he need this huge fleet?

Maybe it may be needed in the future!

That's for later, and who's going to say for sure?

But from the current point of view, there is really no need to spend a lot of time for the Central Brain to build such a starfleet, but it is just a thought, and I can't change the pre-set program of the Central Brain.

"I'm going to take a trip to the Amazon and see the World Tree again, do you need me to bring some fruit back?"

Lu Tianyu's previous plan, after going to the Ruins City, rushed to the Amazon forest, found the original tree hole, and confirmed some uncertain thoughts in his heart.

As a result, the gene therapy warehouse was not found, but the Central Intelligence Brain was deceived, and this is the matter of buying the island. After this incident, Lu Tianyu still wanted to go to Amazon, but remembered that the fruit of the World Tree was very important, so he asked the Central Intelligence Brain.

"Don't bother!"

"Oh!" Lu Tianyu was a little puzzled: "Why? ”

"Just go to that little lake in the middle of the island!"

The central brain led the way, and Lu Tianyu soon came to the small lake in the center of the island, a waterfall flowed down from the cliff, and the lake below was crystal clear, calm like a huge mirror, shining golden in the sun, making people have the urge to go down to the lake for a swim.

Lu Tianyu, who was enjoying the beautiful scenery of the lake, suddenly felt the ground under his feet tremble slightly, and the earthworm-like machine that had previously drilled into the ground came out from below.

Under Lu Tianyu's surprised gaze, the earthworm-like machine quickly dug a large pit with a diameter of 100 meters in the open space by the lake.

As soon as Lu Tianyu wanted to ask, he saw the earthworm-shaped machine open its big mouth in front of it, and countless shiny ores poured out from inside the machine, filling the entire pit within a radius of 100 meters.

"Spirit Stone!"

Lu Tianyu felt the extremely rich aura from these shiny ores, and every pore on his body stretched out, desperately absorbing this terrifying aura.

"There is a very good spiritual vein underground, in addition to being able to be used by cultivators, the spirit stone can also be absorbed by the World Tree, doesn't Your Highness have the World Tree Fruit Core in his hand? Use the resources here to plant a World Tree! ”

Lu Tianyu recalled the information about the World Tree in his mind, the World Tree needs to grow on the spiritual vein, and the World Tree cannot be planted where there is no spiritual vein, and the quality of the spiritual vein determines whether the World Tree can truly become a holy object that controls the world in the future.

When there is no truly grown World Tree in a world, there can be an infinite number of World Tree seedlings, until the only World Tree grows up, and the other seedlings that do not become World Trees will wither.

The Central Brain actually wanted to plant a World Tree on the island, which seemed to be a good choice.

Lu Tianyu took out a World Tree Fruit Core from the storage space and threw it on those spirit stone mines, and the naked eye could see that the World Tree Fruit that had just been dropped split from the middle, and countless tiny roots quickly spread out to the surroundings, wrapping pieces of spirit stone mines of different sizes in the roots.

A small green bud slowly revealed, and then two, three, and a leaf the size of a mung bean grew wildly, and almost in the blink of an eye, a new leaf would emerge, stretching out into the air, and in less than five or six minutes, a World Tree seedling grew in front of Lu Tianyu's eyes.

(End of chapter)