Yun Yi nodded, and this is the only way to do it for now.

"Can we also develop the underground space of the target time and space? This is a large area of ​​land?"

"It is true that with current technology and the ready-made geographical data I have stored, it can completely develop underground space without any obstacles. Moreover, artificial sun is not difficult for the current empire. It is just a more advanced utilization of nuclear physics. Although it will lose its role as a main weapon in the future, there are still many other aspects to use it."

Chu Ji seemed to be considering the feasibility of this issue, and replied after a little consideration.

"It's better to destroy the monster, otherwise you won't be at ease if you do anything."

Yun Yi nodded when he heard this. It is certain that the monsters appeared on the earth countless times, but he certainly did not know that there was an underground continent of 3.25 million square kilometers hidden under the Antarctic continent.

Yun Yi didn't want to develop it at this time. Any new move in the development of technology would attract their attention. It would be a bad thing to expose that space to the eyes of monsters. Who knows whether he can successfully reach the highest point of the universe? At least he should leave some pure space for the later generations just in case.

Yun Yi has no absolute confidence to reach the highest level of this universe. There are many obstacles in the first level. Who knows how many enemies they will face later? And God knows how many nails the monsters have laid in this universe. Could it be that they will abandon the civilization they control after destroying the poorly developed inheritors? Just think about it and know that it is absolutely impossible. Wasn’t the Tiansheng Empire destroyed by the civilization controlled by monsters in the Milky Way?

But the target space-time monster is unknown compared to the modern space-time forces. The future is completely unknown. Yun Yi, who is about to enter a first-level civilization, dare not say anything big at this time.

The distant starry sky arrived quickly at the speed of the spacecraft. As they spoke, the spacecraft slowly left the jump state, and the rapid decrease in speed brought a wave of dizziness to people's vision.

The familiar solar system caught Yun Yi's eyes again.

"This, this is too fast!"

He had to exclaim that compared to the time he took to go to Bie Neighbors, the return trip seemed to be as convenient as a bus on Earth.

Instead of stopping the spacecraft, Douding continued to fly towards the earth.

"This is still far from that. The leap speed of the fourth-level civilization can reach 100-1000 times the speed of light, which is fast. Every advanced cosmic country rules large areas of star domains. For them, there is no fast enough transportation, not to mention ruling huge territory."

"Ten millions of years have passed, and the Blue Star is still so beautiful!" Looking at the earth that is getting closer and closer, Wali exclaimed.

The earth became larger at a visible speed in the eyes of everyone until Douding hovered the spacecraft in low-Earth orbit.

"Don't expose our whereabouts, this will cause panic among the countries above!" Yun Yi had to remind him that he didn't want Dou Ding to have the evil taste like "Yindan".

"Don't worry, your majesty, optical stealth has been turned on. I have detected a lot of electromagnetic waves. It seems that they have not developed quantum communication technology yet, so they are not afraid of being discovered by them."

Yun Yi breathed a sigh of relief. It seemed that Dou Ding, who was used to being a soldier, would still execute orders, without the 'Yindan's relentless heart that evolved.

"Dou Ding, go back to the underground space, the surface world is about to be ruined by a powerful country. I wonder when they will wake up? There is nothing worth observing."

Chuji said with some impatientness.

It was still the seabed on the Antarctic side that entered the underground world. This space did not change at all when he left. Only the robot was faithfully executing the orders given to them by Chu Ji.

"Chu Ji, what equipment does it need to be taken away? It's not realistic to think about completely emptying the city."

Yun Yi stood in front of the dungeon and asked, he could imagine that moving in the future would be a huge project, and he had a space ring, so he would definitely be the main force among the main force.

"It is not as difficult as you think. The key equipment in this city is five sets of 3D printing factories. As long as you have them, all kinds of technological and technological equipment you want to build in the future can be produced. There are only few resources here, otherwise we would not use ground-effect aircraft as a means of transportation to patrol the world."

"What about the others? Are they the only ones?"

"What do you want? Are 5 sets of 3D printing equipment not enough? It is similar to the industrial mother machine in modern society. As long as you have resources, the technology I store can be realized one by one, including all other space warships of the VT-26 frigate during the same period. With the civilization that is not yet reached the first level, but has weapons and equipment of the third level civilization, is there anything else that you are not satisfied with?"

Chu Ji asked strangely, although only five sets of 3D printing factories could not allow the empire to have a large-scale fleet, there were plenty of measures to form a space fleet that guarded the country.

Moreover, as time goes by, more and more warship factories can be built. At that time, the empire can completely rely on time to have a large fleet. No matter what, it will always be accumulated in small amounts. Isn’t it?

“Can a 3D printing factory produce a factory similar to it? That is, copying?”

Yun Yi asked with some whimsical thoughts, if it is really possible, as long as there are enough resources, he can build a fleet that scares the enemy at a low level civilization. Even if he enters the interstellar era, humans will not have to be afraid of the invasion of the civilization controlled by monsters when they integrate into the Milky Way.

Chu Ji rolled her eyes when she heard this and said helplessly: "3D printing factories are somewhat similar to the black technology of the Empire system. This is the ultimate achievement of civilization technology. Do you want to copy them by themselves? How is this possible? When will such an advanced 3D printing factory be able to be achieved when the overall civilization level of the empire is upgraded to level 3 civilization? Compared with the first and second levels, they will definitely be much behind."

Yun Yi knew that he was a little greedy and it was not good to get a job without work. He hoped that scientists in the empire did not learn this bad habit. Although Chu Ji had technical materials for level 3 civilization, they still needed to study them thoroughly to improve the level of civilization of the empire. It was just that they were lucky enough not to study, but only needed to learn. However, the future contains countless scientific and technological knowledge, which is not something that humans can master in a short time.

"Let the city keep it. There are those means of transportation. We take away the remaining resources, and the Chuyang fruits stored in recent years. At least this batch of fruits has not been wasted. Genetic research also needs it. In the future, integration into interstellar civilization requires it to earn us wealth. Zijintan will be collected when we need it."
Chapter completed!