In the face of a mountain of parts, Liu Xuan is actually a big head, just now he just glanced at all the parts, but some obvious defective products were rejected and redone by Liu Xuan, but some fine places still need Liu Xuan to measure by himself, and then they can really be put into use, some things can not have the slightest error, maybe just a few microns of error may lead to the failure of the entire thruster, which is absolutely not allowed.

Once the nuclear fuel is leaked, the terrifying consequences are not so simple and can be solved, Liu Xuan's experiment is to ensure 100% safety from the beginning, and there must not be the slightest error, his work is still very similar to Qin Ming, full of danger, and there can be no slightest error.

Of course, in comparison, Qin Ming's work is actually more dangerous, the energy generated by the collision and annihilation of positive matter and antimatter is not a simple nuclear fusion that can be compared, the next generation of thrusters envisioned by Liu Xuan is actually an antimatter thruster, the speed of light is forty percent, which is really quite attractive, but Liu Xuan also knows that when entering that speed, he also needs certain equipment to ensure that he will not be crushed into minced meat by such a powerful acceleration, and these are not problems that Liu Xuan needs to think about. This is a matter of pastoral preaching. Theoretically, his hibernation system could integrate such a function.

He has the highest right to use all the ultra-high-precision measuring instruments of the Star Ring Company, as long as the corresponding program is set, it can be automatically detected, this matter is what needs to be done on the manufacturing line, but Liu Xuan occupies the manufacturing line of the Federation Planetary Star Battleship after all, and it is not too good to occupy it for too long, so all this Liu Xuan just omitted the production line, which is why when it was first shipped, it had a low yield rate.

As for his three friends, they left when they saw Liu Xuan devote themselves to their own research, and they also chose to believe in Liu Xuan again, believing that he could quickly create a new generation of thrusters and completely solve the problem of relying on nuclear fuel, which is also an important guarantee for their ultra-long-range interstellar voyage.

They all knew that as early as a few decades ago, Liu Xuan had already drawn the design of a new generation of thrusters, and they had never doubted Liu Xuan's manufacturing ability, but in recent decades, Liu Xuan had not put all his mind on research. At the beginning, he was fooling around with the three of them, but now he is fooling around alone.

In this regard, Qin Ming and the three of them naturally hate iron and steel, so this "kidnapping incident" also happened, which can be regarded as a wake-up call to Liu Xuan, don't let him not focus on research all day long, he is a researcher, a scientist, an inventor, not a member of the Federal Parliament.

Seeing that Liu Xuan had also begun to prepare for his own research, they were also temporarily relieved, and now they are all very busy, even Wang Meng has to learn new things. Needless to say, Xuan Mu also understands the next development direction of his hibernation system, which needs to be studied by him. Qin Ming also needs to conduct his own research, he knows that the most critical part of whether he can safely pass through the wormhole is still with him. If he had a problem with that, even if he used the best thrusters in the world, it would be useless.

The four of them finally recognized their position, they were scientists, and their dream was to pass through the wormhole next to Europa and see the world of another universe. Liu Xuan's further dream was to reveal the secret of that mysterious cosmic information, and his subconscious told him that this was very important to all civilizations.

It was an ordinary day, the same for everyone outside the Institute, but for the entire human civilization, this day was the first day that stellar starships began to appear.

Similarly, the Federal Assembly is not idle, compared to outsiders, they all know the grim situation faced by the earth civilization, and if they are not careful, they may attract a powerful enemy again, which is absolutely avoided for them, Liu Xuan's speech was the first time to the Mars Fortress, the Earth Fortress, and the Moon Fortress were all teleported to the past, so that they also understood one thing: peace is only temporary, since the last invasion of the Starfall civilization, there will be no more peace in the Earth civilization.

Since the means of knowing the location of the earth is to use gravitational waves, they also have to find a way to limit this gravitational wave to the solar system and prevent it from being transmitted, so as to fundamentally avoid the exposure of the location of human civilization.

However, although the idea is good, it is still difficult to realize in some places, many researchers and scientists have already broken their heads, but they have not thought of a way to limit gravitational waves, which is also a matter of no way, although human civilization has discovered the existence of gravitational waves a long time ago, but after thousands of years, they still do not understand how to safely and stably build gravitational wave emitting devices, so they also do not understand how to limit the propagation of gravitational waves. In other words, with human civilization, barely reaching the level of first-class civilization, it still doesn't play with gravitational waves.

This path has also been collectively denied by scientists, maybe in the future they may fully master gravitational wave technology, but not now, not in the next few decades, this is the need for the accumulation of corresponding science and technology, their civilization is still too low after all.

The method of eradication is completely denied, they have no way, they can only consider the problem of defense, the earth civilization needs to establish a huge early warning system, so large that the entire solar system is surrounded, the Federal Assembly believes that only this will be the first time to detect external threats, so as to carry out the corresponding defensive attack, this idea is indeed more practical than the previous idea, according to the current technology, it is not very difficult to achieve, but it requires more energy.

Therefore, this idea is decided in this way, which is divided into two aspects, one is to strengthen the defense and early warning system of the entire solar system, and the other is to simply increase the defense of the earth, the earth is their home planet, which needs to be 100% protected.

The direction has been decided, and the next thing is to implement, because the crisis of the last Starfall civilization is still vivid, this time the move of the Federal Assembly has been approved by almost everyone, and it has been relatively tilted by the flow of funds.

The whole plan is huge and grand, and it was also named the "Solar System Defense Plan" by the Federal Assembly, and since the day Liu Xuan devoted himself to his own research, the plan of the Federal Assembly has also begun.

This is how the Starfall civilization gradually faded out of everyone's sight, they all don't know that on several small islands in the Pacific Ocean, the Starfall civilization as an alien is living its own life, leisurely, without the constraints of technology, they are like returning to the era of no computer and no technology more than 2,000 years ago, no struggle, self-sufficiency, closed, and not asking about the world.

As the first batch of aliens to come to the earth, they have completely given up their original ambitions, as creatures in the universe, the only thing they want to do is to live, simply live, just like a general, he also understands the struggle of the first half of his life, he also wants to open, since the last time he sent Liu Xuan away, he has completely entered a state of self-isolation, and all questions from the Federation are refused.

Transwarp is also working overtime to manufacture the parts needed by the Federal Assembly, one defense component after another is radiating from the earth, into its own predetermined position, according to the Federation's idea, the first step is to build a defense system around the Kuiper belt, compared to the first generation of defense system, this time will be more comprehensive. According to the progress of the whole plan, all the defenses will be established in fifty years, and the defense system of the Kuiper belt, the time set by the Federation is indeed only two months, and two months will play a part of the function of the defense monitoring system, which is enough to see the urgency of the Federation in this regard, this is also a matter of no way, no one can accurately predict when the next invasion will be, and the sooner the monitoring system is used, the better.

Liu Xuan is also completely immersed in his own research and can't extricate himself, the prototype of a thruster has been built, and the location is located in the underground of the rocket launch base, after all, this is a very dangerous experiment, and if it is carried out underground, the danger can be well controlled. What's more important is that it can be kept secret, Liu Xuan doesn't want the Federation to know about the existence of such a thruster for the time being, Liu Xuan doesn't dare to imagine that the Federation may use it for anything else.

Qin Ming's shell was already mounted on top of Liu Xuan's thruster, of course, this shell was still not equipped with an antimatter restraint system, it was just a very ordinary shell.

The entire stellar-level thruster does not look any different from the planetary level, but its interior is very different, and after Liu Xuan's special design, the interior of the stellar-level thruster has also been further optimized.

It was only a month, and Liu Xuan had completed the manufacturing of the thruster on the drawing, which seemed to be only a month, but Liu Xuan had been thinking about this plan for decades, which was also an important reason why he could quickly complete the propulsion system. Accumulate and that's it. To put it simply, in fact, it has been half a century since Liu Xuan waited for this day.

The rest is a test flight, in order to hide people's eyes, Liu Xuan also launched the Pluto probe in the name of the Star Ring Company, and long-distance propulsion is the most critical place to test this thruster.

Since there is no need to pass through the wormhole, all the shells are the most ordinary aerospace materials, and the restraint system designed by Qin Ming is not used, and the trial operation will start in three days!