Chapter 647 Sustainable Development

For the next period of time, nothing seemed to happen in World Tree.

Everything is going step by step.

The existence of the monster was not discovered by the people inside World Tree, and its arrival did not attract anyone's attention.

And it left after discussing with Wen Guixin.

Of course, it didn't leave Yggdrasil.

It couldn't leave without Xu Xin's permission, and it was here to seek cooperation and didn't need to leave.

But it did not stay in the currently densely populated area, because its appearance is inherently unacceptable to humans. Even if the survivors are well-informed and may be able to accept it, the humans in the underground world may not be able to accept it.

Of course, the most important point is that although it is half human and half monster, its aesthetics is still more on the monster side because it grew up with alien invaders.

Therefore, it does not want to live among a group of humans at all. This is simply scarier than hell for it.

So, it planted a tree house at the very edge of the inner world of the World Tree and lived there temporarily.

Although it is a bit far away from here, it has the ability to teleport through space, so the distance is not a problem to it.

"Well, although my life now is basically the same as before, I always feel like I'm no longer in the mood to relax."

Li Wenxi sat on the sofa, leaning on Xu Xin with one shoulder, sighing a little.

Now it has been another five days since the monster came to World Tree.

It is five days inside the World Tree.

Just over an hour had passed outside the World Tree.

The petrified biota is now very close to the World Tree, and it will probably take less than fifteen minutes to reach the edge of Crystal City.

Of course, fifteen minutes in the outside world is also a full day in the world tree, so they are not in a hurry.

Now that we know that those petrified creatures are not enemies, there is really no need to worry.

"Do you think we are really going to do that kind of thing in the future?" Li Wenxi asked softly, "Using the World Tree as bait to attract the alien invader's army... Wouldn't this kind of thing be too dangerous?"

Danger is definitely dangerous.

Moreover, this is basically equivalent to betting the lives of the people living in the World Tree.

"We still have enough time to consider it now." Xu Xin held her in his arms, "This is just one of the proposals."

However, this is the only proposal that can be seen so far that has a probability of success in driving alien invaders away from the earth.

The World Tree is the only existence qualified to be used as a bait, and if all the alien invaders' armies are stationed, it is basically impossible for them to sneak into the important area.

"Well... our life is very good now, wouldn't it be nice to just... continue like this..."

Li Wenxi's voice became smaller and smaller. She felt that her words were a bit useless, but that was indeed what she thought now.

"This... is also a choice." Xu Xin said melancholy.

In the past three days, their explorers have discussed this matter more than once, and basically everyone can't make any good decisions.

At the same time, he also discussed it with Ji Chaoyang alone.

The two people have basically reached an agreement on their thoughts and opinions.

That is……

All in all, let's develop our armaments crazily first.

Just develop your strength first.

Others can be put aside first to replenish the military strength in key areas.

The World Tree is fully armed, and the people in the World Tree are also fully armed.

To the extent that all people are soldiers.

Then they will use their most powerful weapon at present: nuclear weapons to expand their number to the maximum extent!

Because there is space storage capacity, no matter how many nuclear weapons they have, they don't need to spend a lot of energy to maintain and preserve them.

So no matter how many you make, there is no problem, and safety is also guaranteed.

At the same time, Ma Hongwei and Zeng Tao's focus in making weapons has completely shifted to the direction of missiles, first ensuring that their nuclear weapons can be fired out.

In short, it is a crazy development of force.

As for what happens next, then...

Take it one step at a time.

They have no plans to take the initiative and expose their strength for the time being.

Because they don't know how strong they need to be to resist the attack of alien invaders.

The two of them simultaneously chose the safest option at the moment: waiting for the alien invaders to come.

If the other party comes knocking, they will fight back and carry out their previous plan.

If they don't come to the door, then they will try their best to develop their own force. No matter how strong the force is, it is not strong.

As for the alien invaders…

The monsters have told them that the alien invaders have entered a period of stagnation in technological development. In layman's terms, it means that they can no longer become stronger.

Therefore, the longer it takes, the stronger they will develop, and the better it will be for them!

Maybe the interior of the alien invaders will become more chaotic.

"I always feel like I can't calm down..." Li Wenxi lay on his lap.

"Yingying, hasn't she come back yet?" Xu Xin changed the subject.

"Well, no, just over an hour has passed outside. How could it be so fast?"

After negotiating with the monster, Xu Ying ignored Xu Xin's obstruction and left the World Tree to go to the underground world.

She wants to add some population to the World Tree.

Because the thousands of people inside World Tree now are too few from the perspective of fighting against alien invaders.

They need more people and more labor force to develop faster!

However, Xu Xin is very worried about Xu Ying's current state.

He had already known before that Xu Ying's entry and exit from the World Tree would cause her own time and space disorder due to the difference in internal and external time flow rates, aggravating her symptoms.

"Yingying, she will be fine." Seeing Xu Xin's worried expression again, Li Wenxi comforted, "Yingying reassured me before she left, saying that she didn't want to die now, at least she wanted to witness the alien invaders being driven away. , so she won’t joke with her own life.”

Xu Xin sighed: "I know, and I also know that she won't seek death, but I'm afraid that she won't be sure of her situation, or some special situation will arise..."

"Don't worry, Yingying has lived for more than three hundred years. She can control these things better than us."

"Right."

…

After resting for a while in the villa with only two people, Xu Xin went out.

It is daytime now in the World Tree, the sky is still very bright, but there are no people on the streets.

In order for everyone to produce with the highest efficiency and for the sake of everyone's health, a timetable has been set up in Yggdrasil.

Now, according to their time, it was already midnight and everyone had already rested.

But Xu Xin knew that it was impossible for one person to rest.

"Brother Xin, you are here."

When Xu Xin entered the tree house, she saw Ma Hongwei lowering his head and studying something.

There were metal parts and equipment everywhere, and there was a somewhat unpleasant smell of fuel.

The metal parts everywhere made Xu Xin feel relaxed.

The changes in Ma Hongwei's laboratory can really symbolize their current development speed.

This is Xu Xin's previous treehouse. Because of its large area, the first and second floors have been opened up.

Ma Hongwei currently does not live in any house, but already lives in this tree house, where he spends basically all day long.

Because of the new technology, Ma Hongwei became almost crazy about researching weapons.

He has been in this state for a long time. It started after Xu Ying arrived. According to the time in the world tree, it has been two months.

Xu Xin originally thought that this state was just a temporary excitement, but he didn't expect it to last for such a long time.

However, he was happy to see this happen.

"How is it? Is there any progress in the research?" Xu Xin walked to Ma Hongwei's side.

"It's almost finished. It's just based on your request, Brother Xin." Ma Hongwei pointed to a facility that was two people high.

A...missile launcher.

"So young?" Xu Xin was a little surprised.

There is a missile on the launcher, and the length of this missile is even more than one meter.

"It's just a current test product. We will make a large-scale one in the future. As for large-scale production, I leave it to Zeng Tao." Ma Hongwei explained.

Zeng Tao's ability is to make large-scale weapons.

"Right."

Xu Xin nodded.

Zeng Tao is now very skilled in weapon development. Using her abilities, she can easily carry out large-scale research on the weapons developed by Ma Hongwei.

"According to your requirements, the firing speed of this launcher in conjunction with our missiles can already reach a maximum of about Mach 50 in the surface atmosphere. But correspondingly, because the main fuel is used for explosive push, the missile's range It drops significantly, and if the target location exceeds 100 kilometers, the accuracy will drop significantly."

In other words, this is a missile that greatly enhances its flight speed at the expense of range.

This is also the weapon that World Tree needs most at present.

No matter how far the range is, it will have no effect on this extremely huge planet.

Because their missiles cannot cross half a planet to attack alien invaders. Even if they have this range, if the opponent has an anti-missile system, it may not have any effect.

Therefore, what they focus on developing is "defensive weapons."

They want to ensure that the surroundings of the World Tree are safe. This short-range, but extremely fast and almost impossible to counterattack missile is the weapon they need most at the moment.

Achieve an irreversible blow to the surroundings of the World Tree.

Mach 50, a speed of fifty times the speed of sound, this speed is already very impressive.

You know, thousands of years ago, missiles that could exceed Mach 5 speeds in the atmosphere could be called hypersonic missiles.

Mach 50, very exaggerated.

About 17 kilometers per second.

Even if the missile is launched outside the World Tree, if a person is inside the World Tree and observes it with a time velocity difference of a hundred times, it will still be at half Mach speed.

In other words, if you launch a missile inside the World Tree and look outside the World Tree where time is almost stagnant, you can still see that the missile is fired at a speed of more than 170 meters per second and a speed of more than 600 kilometers per hour.

Even if it is slowed down a hundred times, it is almost as fast as a commercial airliner.

Xu Xin felt that a missile of this speed should be impossible to intercept.

For defense, it is completely sufficient.

If there are cores inside...

"This way, I feel relieved for the time being."

Xu Xin felt that for the first time since the monster came, he felt a little relaxed.

"I'll try my best to finish it within two days, and then I can hand it over to Zeng Tao to be enlarged."

Xu Xin nodded.

Then he touched his chin and looked at this small pocket missile.

This kind of pocket size seems to be able to be carried...with you anywhere.

Although small missiles can hold much less ammunition, if they are nuclear, their power cannot be underestimated.

If one day they really want to sneak into the other side of the earth to destroy the scarlet crystal, this missile may be of great help!

"You haven't had any rest today, so go to bed early. Don't hang on purple oranges all the time. Those things are not good for your health." Xu Xin stood up.

Blue-level and above oranges refresh and refresh the mind by overdrawing life. They have already told all the survivors in the World Tree about this. At present, these people basically no longer eat blue-level fruits.

Purple-level fruits and above are much less harmful to lifespan. In addition, the resources in the World Tree are now very abundant, and purple-level fruits have become everyone's first choice.

But you can't eat it often. Although it will give you some powerful abilities at the moment, it will still have an impact on your lifespan.

"Don't worry, Brother Xin, I am a person who has been injected with genetic medicine. My life span is very long. It is more important to make weapons."

Ma Hongwei couldn't get enough of it, so he turned around and continued to invest in research.

Xu Xin shook her head helplessly, stopped disturbing him, and came down from the tree house.

"ah--"

In the distance, the pterosaur Huihui was gliding towards here at an extremely fast speed.

A few seconds later, it landed next to Xu Xin, and its big head rubbed against Xu Xin's body.

"Hey!"

Coco, who was lying on Hui Hui's head, jumped down and jumped onto Xu Xin's shoulders.

"Have you had enough fun?" Xu Xin rubbed Coco's little head.

"Hey!"

This little guy often comes out to play with Huihui recently.

The injury that Huihui suffered last time has long been fully recovered without any traces.

"I'm going back and I'll see you next time."

"ah!"

Xu Xin brought Coco to a coordinate.

He reached out and touched the coordinates, the purple-black vortex condensed, and the portal appeared.

Xu Xin stepped into it.

After the world was spinning, he appeared at the very edge of the inner world of the entire World Tree.

The endless high wooden wall represents the end of the world.

And here, there are three tree houses, each of which is a three-story tree house, with a single-story area of ​​400 to 500 square meters.

They are all very big treehouses.

"Xu Xin, is something wrong?"

One of the treehouse windows is open.

The monster's ugly head with eyes appeared in the window frame.

Because there was no one else around at this time, the monster no longer only opened the two eyes on its face like before, but opened all its eyes.

The eyes did not blink at the same time, but sequentially from left to right. The eyes on the monster's upper body exposed from the window were surging like ocean waves.

This made Xu Xin feel a little physically uncomfortable, and the corners of his eyes twitched slightly.

"Huh..." Coco shrank her head and closed her eyes.

"I heard your experiment is going to be successful."

Xu Xin looked at the monster and said.

"What, do you want to stop my experiment?" The monster's weird voice deepened slightly.

"Of course not. I'm just curious as to how far your experiment has progressed. Are you really going to create a race?"

The monster lives in the outermost area, and an important point is that it continues its experiments here.

This was actually the condition for Xu Xin and Xu Ying to agree to it.

In the World Tree where time flows at a hundred times the speed, give it an area and let it continue its experiments. In exchange, it cannot take action against the humans in the World Tree.

"...How difficult it is to create a race."

The monster disappeared into the window frame, and then a purple-black vortex instantly formed in front of Xu Xin, and the monster walked out of it.

He appeared in front of Xu Xin almost instantly.

"Hey!" Coco was startled and hung directly behind Xu Xin, with only half of his head exposed to look at the monster.

The monster did not pay attention to Coco, but continued: "However, although it is difficult, I have taken the first step. I awakened one of them."

"It has a clear consciousness, but unfortunately...like me, it does not have the ability to reproduce."

Xu Xin was immediately surprised: "Has anyone come back alive?"

He looked at the three tree houses: "In the tree houses?"

"Well, he's already asleep." The monster's mouth split open, as if smiling, "My first kin is in good condition."

...It actually worked!

"Awesome." Xu Xin praised it sincerely, and then said, "I won't watch anymore. I'm here to tell you that the petrified creatures are coming soon. What do you want to do?"

It is the one that controls the petrified creatures.

"I will hand over the command of the petrified creatures to you." The monster said immediately, "This is the first gift I give you."

Xu Xin smiled slightly.

It seems there is no need to waste any more words.