The spacecraft improvement project took three months. However, the improved spaceship did not have the same feeling, because in terms of appearance, Li Yu did not plan to improve it.

In addition to the engine system, Li Yu also made small-scale improvements to other systems of the spacecraft.

It's just that this improvement, from the outside, is basically invisible.

"We're almost rested, the next target, which one shall we choose?" Li Yu asked the others.

Li Yu didn't have hope, there would be huge gains in the next goal, so he asked casually.

"Pick any one, shall you? Xiao Wei, this time we pick a galaxy with a more developed civilization for investigation, and we also need to change our taste! Fang Qianmo proposed.

Finding a galaxy with a relatively developed civilization is not a problem for the laboratory. The more developed the civilization, the more information they produce, and this information is not something they can hide if they want to.

The equipment of the laboratory can roughly infer the civilization level of a galaxy based on this information, which is also the experience summed up by the laboratory after a long period of investigation.

Since he said that he wanted to pick one at random, Xiao Wei picked a river system at random.

The target river system is not too far from the galaxy where the laboratory fleet is now located, and it is half a million light-years, which is a jump thing.

"Shall we jump over or do we go slowly?" Xiao Wei asked Li Yu.

"Don't worry, we have changed a lot of equipment this time, and we also need to test it."

The itinerary is like this, Xiao Wei arranged it according to Li Yu's meaning. The improvement of the spacecraft this time can be regarded as a big move, there is no change in the appearance, but the inside can definitely be regarded as an upgrade, in this case, it is not possible to test it.

The first is carried out, which is the testing of the conventional engine.

The measurement of the conventional engine, carried out for a week, Xiao Wei collected a large amount of data, analyzed the data, Li Yu They found that there were no major problems with the conventional engine, and some small problems did not affect the navigation, and after they appeared, Li Yu solved them on the spot.

Since there was no problem with the conventional engines, the sailing mode of the laboratory fleet was changed to faster-than-light sailing.

Faster-than-light travel, no matter which way, the traces it leaves in the universe will not easily dissipate.

After pulling out a few segments, each with a full 100-light-year trajectory, the test of faster-than-light navigation was also announced.

The space teleportation engine to be tested next, Xiao Wei did not teleport in place at one time, she chose the method of interval testing, and divided the remaining flight range into several parts, 10,000 light years, 100,000 light years, and then tested the engine.

"The results of the test are perfect!" Xiao Wei summed up with a calm face.

This is very normal, the quality of the products in the laboratory has always been perfect.

"That's how it should be!"

"Next, let's go straight to the target river system!"

It's a pity that a letter made Li Yu and them temporarily stop sailing.

"Li Yu, the country has decided to abandon the river system where the alien ruins discovered by the American imperialists are located." Cheng Yingnan brought a piece of news that surprised Li Yu.

Not long ago, Li Yu had agreed to let Cheng Yingnan expand the defense scope of the deep-sea base, and include the extragalactic galaxy explored by the US imperialists into the defense range of the deep-sea base.

In this case, Li Yu believed that the alien civilization was definitely not the opponent of the deep-sea base. Now, Cheng Yingnan said that the country had decided to abandon the planet with alien ruins, which surprised him.

"Why give up? Could it be that the country has already studied that alien base thoroughly? Fang Qianmo said suspiciously.

"What you said is not wrong, that alien base has no value to study now, because of a surprise attack by aliens, that alien base, was destroyed!" When Cheng Yingnan said this, his expression was slightly annoyed, and it seemed that what happened made Cheng Yingnan's face very dull.

"Are you careless?" When such a thing happened, it seems that only Cheng Yingnan was careless with such an explanation.

"Yes, we didn't expect that the aliens would suddenly master the space jumping technology, and by surprise, the planet discovered by the US imperialists was broken through by the aliens."

"Although we quickly organized a counterattack, the alien base has been destroyed. In this way, there is no longer any meaning for us to hold on to this planet. ”

"The country and US imperialism have decided to abandon this planet."

It turns out that the most fundamental reason why the United States imperialism and Huaxia do not want to give up this planet is the alien base that exists on this planet.

Now that this base has been destroyed, then there is no point in them holding on to the planet. The United States imperialism and Huaxia have decided that when they abandon this planet, they will destroy the stargate by the way.

But Cheng Yingnan is not willing to give up on this planet.

The training conducted at the deep-sea base is in full swing, and if it is suddenly interrupted, it will be very unpleasant.

It's just that if humans evacuate this planet, there will be no reason for the deep-sea base to stay on this planet.

After organizing an attack on the aliens, which caused the aliens to suffer great losses, the fleet of the deep sea base also returned to the galaxy.

"Retreat, retreat, focus on aliens, and if they have the intention of invading the galaxy, fight back with all their might!" Li Yu decided Cheng Yingnan's next action principle.

"Okay. It's just that it is not easy for aliens to invade the galaxy, and judging from their actions last time, they have only mastered the space jump technology. ”

"Invasion of the galaxy, they still need to work hard for another hundred and eighty years."

Cheng Yingnan said confidently.

"Don't be careless!"

The correspondence with Cheng Yingnan was hung up.

What happened to Huaxia and the US imperialists, Li Yu did not take it to heart. An alien civilization that is not even a river-level civilization, if it weren't for the stargate, they would not be able to pose any threat to the earth at all.

With the existence of a deep-sea base, Li Yu also believes that even if this alien civilization develops to the point where it can come across the river system, the deep-sea base at that time will be even more powerful, and aliens can only send death when they come to the galaxy.

In this way, there is nothing to worry about in the laboratory, not to mention, there is still an energy matrix in the Milky Way.

A spatial teleportation, the laboratory's team arrived at the target river system.

It's a river system about the size of the Milky Way.

According to Xiao Wei's detection, in this river system, a river-level civilization has been born, and it is in the final stage of completing its domination of the entire river system.

The civilization that is about to rule the river system and become a river-level civilization is the Casey civilization.

The powerful ability of the laboratory spaceship allowed Li Yu and the others to collect a large amount of information about the Kaxi civilization one day after they arrived at the outskirts of the Kaxi River system.

At this time, Li Yu had not even sent a reconnaissance ship.

After sending a large number of reconnaissance ships, the details of the Cassie civilization were turned upside down by the laboratory.

The Cassie civilization originated from the fifth spiral arm of the Cassie River system, the Cassie system.

The Cassie galaxy is also just an ordinary galaxy.

When the Kassi star salivated civilization, the civilization of the entire Kasi River system had fallen into the Warring States period for a long time.

Originally, the Cassie civilization existed as a subsidiary civilization of another civilization. However, for the sake of war, the main civilization excessively squeezed the Cassie civilization, which overwhelmed the Cassie civilization and could only rise up.

The Cassie civilization, which was forced to resist, did not expect that their resistance would not only succeed, but also take the place of the main civilization.

Since then, the development of the Cassie civilization has been out of control, from a small galaxy-level civilization to a river-level civilization.

This is Allah's horn treatment! This is Lin Wanbai's emotion.