my doomsday fortress

On the surface, this place is definitely not suitable for building a base. Not to mention other things, those mountains with a height of tens of thousands of meters are difficult problems for ordinary people to solve.Not to mention that there are various primeval forests, dark swamps, and all kinds of violent and bloodthirsty mutant beasts.

However, this question is not difficult for the Doomsday Fortress.

The Doomsday Fortress will automatically plan and change all the terrain within the range, and it can also accurately identify and isolate various creatures that do not belong to the Doomsday Fortress.

Things that are difficult for other bases and evolutionists, here, will be turned into various benefits by the Doomsday Fortress.

For example, those mutated beasts, as soon as the doomsday fortress is built, they will immediately become Li Wenbin's dinner, and he doesn't need to spend extra effort to find and catch them everywhere.

"That's it, then, let's start upgrading!"

Having made a decision, Li Wenbin immediately chose to upgrade the Doomsday Fortress.

Confirmed, upgrade started

Estimated time for this upgrade: 24 hours

After the icy mechanical sound sounded, the radar, which had not been seen for a long time, spread like a circle around Li Wenbin again.

This time, the speed of the radar aperture was extremely fast. In just a few seconds, it surpassed the territory of the third-level doomsday fortress and continued to expand.

When the thunder halo stopped moving, information about the size and range of the fourth-level doomsday fortress also appeared in Li Wenbin's mind.

Then, Li Wenbin was stunned!

Not because the range of the fourth-level doomsday fortress is too small, but because it is too big!

The size of the third-level doomsday fortress is a square with a side length of 2 meters, covering an area of ​​400 square kilometers, which is equivalent to one-third of the original Hong Kong Island Special Administrative Region.

This range is already large enough.

According to the experience of the previous upgrades, after each upgrade of the Doomsday Fortress, the side length of the territory will be expanded ten times on the original basis.

Originally, Li Wenbin thought that it would be the same for upgrading from level three to level four, but the reality was far beyond his expectations.

The coverage of the fourth-level doomsday fortress is not a square with a side length of 20 meters as he expected, but 200 million meters!

Yes, the four-level doomsday fortress has a territory of 2000000 meters on one side!It is a hundred times larger than the 2 meters of the third-level fortress!

What is the area of ​​a square with a side length of 200 million meters?A full 400 million square kilometers!

This is an extremely terrifying data. This size is almost as large as half of China before the end of the world. Such a large area is just a fortress.

If this is said, who can believe it?

At least, if there is no apocalypse, if someone tells Li Wenbin that a private fortress can be as big as half of China, then he will definitely persuade him to go to the hospital to have his brain checked.

It’s incredible!

If it weren't for the fact that the earth was already several times larger than before, once the fourth-level doomsday fortress appeared, it would definitely include all the nearby survivor bases.

Even now, the fourth-level Doomsday Fortress is about to connect several sub-fortress bases such as Longling City. Many survivor bases in the three provinces of Shaanxi, Henan, and Hubei have been included in the scope of the Doomsday Fortress within.

This unexpected surprise saved Li Wenbin a lot of effort!

"Could this be a big transformation of Doomsday Bastion from primary to intermediate level? It's like an evolutionary breaking through from the second level to the third level. It's a complete qualitative change."

Li Wenbin sighed, with his own guesses.

The upgrade of Doomsday Fortress is still in progress.

Just like when it was first built, the fourth-level doomsday fortress first appeared, and it was still the outermost city wall.

It's just that the city wall this time is really scary. Perhaps it's more appropriate to use mountains to describe it.

The height of the outer wall of the fourth-level doomsday fortress reached a terrifying 150 meters, and its thickness was also seven to eighty meters. When it appeared, it looked like a long dragon emerging from the ground and winding across the ground.

Looking from a distance, one can't see the end at a glance, like an eternal mountain range, extremely magnificent.

The newly-appeared city wall rose out of thin air without any trace of piled up, like a whole, enclosing all the land of 400 million square kilometers inside.

After the city wall guards were closed and fully formed, a city wall rose again inside the city wall.This is the city wall that originally belonged to the third-level doomsday fortress, with a height of about eighty meters.

After this city wall was raised, another city wall was raised inside, which belonged to the original second-level fortress, with a height of about [-] meters; finally, around the most central position, another city wall was raised again, That was the first wall that appeared when the first-level fortress was built.

The four city walls were formed one by one, dividing the land of 400 million square kilometers into four areas. The outermost area is the largest, and the area gradually decreases as you go inward.

Rumble!

After the four major city walls were fully formed, as before, the ground within the range of each city wall began to rise gradually, like a pyramid, divided into four steps, gradually rising from the outside to the inside.

At the same time, the topography of the entire Level [-] Doomsday Fortress also began to change under a magical force.

Under the position closest to the four city walls, the ground began to sink, and a huge gully hundreds of meters deep and tens of meters wide appeared out of thin air, presenting a shape similar to the word Hui. All four regions are connected together.

This is not over yet. After the large zigzag-shaped gully was formed, countless smaller gullies began to appear, like spiders, spreading reasonably within the four major regions.

After the last gully was completed, the rivers and rivers that were originally within the range of the Doomsday Fortress began to move.

Under the pull of an invisible force, the river flowed into a huge back-shaped gully, and then flowed quickly, filling all the gullies soon. There is no source and no end, but it keeps flowing without any stagnant water a feeling of.

So far, reasonable and perfect water resources have appeared in the doomsday fortress.

And the various mutated creatures that originally lived in the big rivers still live in these rivers now, and under the magical effect of the doomsday fortress, they will not actively attack the evolvers in the fortress.

These rivers can be used not only as moats to defend against incoming enemies, but also for life, construction and irrigation of crops.

Changes continue.

Some mountain peaks that were neither big nor small, without any special features, began to melt, disappearing from the ground at a speed visible to the naked eye.

Those majestic peaks and mountains are scattered in various areas of the four major regions, and, from the outside, they are still tall and handsome peaks, but in fact, their interiors have been hollowed out, forming a There is a mountain space.

It can be used not only to beautify the scenery, but also to build some secret bases, which is very practical.

The mountains are changing, and the forest is not stopping.

That magical power, like an incomparably seasoned decorator, rearranged the forests that were originally scattered everywhere.

The plants and flowers that look more beautiful, not too big, appear on the official roads of the four major regions, serving as beautifying plants; the plants that are neither beautiful nor outstanding are perfectly cut into Section after section of wood is waiting for construction and use; the last tall and magnificent virgin forest plants are gathered together to form a huge primeval forest.

And those original mutated beasts, living in this forest bin, cannot leave this area.

After the layout of more conspicuous things such as mountains and forests is completed, it is the turn of the ruins left by the original human cities. Some buildings that are still intact are preserved, and those buildings that can no longer be used are dissipating and turning into the most primitive materials, wait to be re-used in construction afterwards.

The earth, too, began to change.

The land that used to have various terrains such as grasslands, hills, valleys, and swamps gradually turned into a neat avenue paved with ten-meter-square bluestone floors, extending in all directions, connecting the four major areas in the fortress together, forming a Perfect traffic channel system.