Liu Xuan's time is still very short, one day's time, a few days' work, the most important thing is not to make mistakes, now that time is urgent, there is no time for them to build one again. It was definitely a big challenge for them to have both quality and speed at the same time.

Liu Xuan and the four of them were already mentally prepared not to sleep or eat, but after they really arrived at the place, they really understood what situation they were facing.

The main part of the interstellar missile, that is, the nuclear warhead part, the radioactive material needless to say, they need strict protection, the current radiation protection clothing has become ultra-thin, the use of magnetic field to limit nuclear radiation, the degree of resistance is infinitely close to 100%, but then there is a serious problem of heating, the energy consumption brought by the generation of magnetic field has become the form of heat, although the wear is very thin, but it is very hot, they can not take it off.

After only three minutes of wearing, Wang Meng just gave up, and in the end, only the three of them arrived in this confined place, which was the most critical interstellar missile in this operation.

One of the tasks of Liu Xuan's three people is to dismantle the thruster behind the original interstellar missile, and then transform the new thruster to connect the place, and finally link the two things together. They only have one day.

There is no time to hesitate, they have already studied and understood the specific transformation plan, and the next step is to complete the transformation of these things with other staff.

At this time, the entire Guardian Space Battle was busy, preparing for the first contact. The space battle of the Liu Guardian is the most important command location, and Ringer is fully responsible for everything, so you can imagine how much pressure he has.

You must know that the Federation does not pay attention to this operation, but the focus of the Federation is on the alien fleet, and basically there is no time to care about this crashed starfall.

On the other side, two light-years away, near the Oort Nebula, a huge alien fleet is heading in the direction of Earth.

"General, our interstellar missile is already heading towards that planet, there is only so much we can do in the long range, and the interstellar missile is very badly damaged, but there is no problem with detonation." A man who looked like an engineer knelt in front of a command platform and said very respectfully.

This is the interior of the alien fleet, and it is worth noting that their form is basically the same as that of the earthlings, not as strange as in the movie.

"In addition, the people of that planet call their planet Earth, and their electromagnetic wave communication has been sent, mainly to ask our purpose, great general, how should we reply?" The engineer continued.

"Earth, it's really a good name, their body structure is basically the same as ours, it seems that they are also people of the first civilization level, but looking at this look is still almost like us, we are at least the ability of interstellar voyages, they still don't seem to have mastered this technology, it seems that we have a greater chance of winning this interstellar expedition." The current leader is still a little dissatisfied with our speed, after all, this is our planet's first interstellar expedition, it is better to be careful. As for the message of the earth, there is no need to reply. The general stood on the podium, his hoarse voice even tinged with a hint of fanaticism.

He has the qualifications for this fanaticism, because this interstellar expedition was initiated by him, and he personally commanded the expedition, no matter what the final result is, his name has been recorded in the annals of their planet, which is definitely a great honor for him.

"General, I think there is still a reason for the leader's urging, those peaceful people on our planet have been calling for the recall of our fleet, and the leader is under great pressure." On the other side, the person who looks like an adjutant is also a timely reminder to the general.

"I know, but the fuel of our fleet is still not enough, interstellar warfare is indispensable for space melee, and we don't know where the Earth civilization has reached, or be careful to die. You don't care about all this, I've already made a decision. You just have to mind your own business. The general looked a little unhappy, this adjutant was sent by the leader to supervise him, and he was naturally very unhappy. But after all, this is the leader, and he can't say anything.

"Do you have faith in this interstellar missile you invented?"

The general's voice changed, he looked at the engineer kneeling down, and then asked solemnly. This is their gift to Earth, and the general is very fond of this thing. This is also their strongest method, using special technology.

"General, as long as it can hit the earth, I believe that this interstellar missile will play its due role, and the general also knows the characteristics of Ulu metal." The engineer also said with confidence.

The general nodded with satisfaction, he still had lingering fears about this strange metal, and he still couldn't forget the tragedy when he first discovered it.

"Well, let's all go to sleep, we still have some time to recuperate." The general ordered. The engineer and the adjutant left the command room, leaving the general silently looking out at the starry sky.

It was like a dream to him, and the exposure of the Earth's position gave him a chance, a chance to express himself.

To be honest, the general was very skeptical at first, and it was an accident that they discovered the existence of the earth's civilization.

The general still remembers that it was an ordinary afternoon, and he was visiting an institute, a gravitational wave research institute.

At first, everything was normal, and the general didn't think too much about it, he had done this kind of visit hundreds of times in the past, just to increase the popularity of the institute and spread the leader's modern advanced ideas.

However, that afternoon, that institute, was destined to be of extraordinary significance.

About halfway through the tour, there was a big alarm bell throughout the institute, which was a signal to call all the researchers. The general, who had nothing to do, followed them to this meeting place.

There are a lot of data on the screens in various places, and the general is a soldier, and he can't understand all of this, but all he can see is the joy on the faces of these researchers.

"General, your arrival really made our institute shine, and we actually observed gravitational wave data." The head of a research institute also said with a happy face.

The general didn't understand any of this, and the only thing he saw was that this thing was important.

"Although the origin of this gravitational wave is still a mystery, we have discovered something else. General, what do you think this looks like? The researcher pointed to a very blurry image and said in half.

"This, this, this is a man-made object?!" Although the picture was very blurry, the general still recognized the thing, and immediately lost his temper.

"Yes, that's the parsed message. However, according to our observations, this civilization should not be able to master gravitational wave technology, so the source of gravitational waves is still a mystery. ”

The general was stunned for a moment, and then directly had a bold idea, that is, an interstellar expedition.

It took a lot of effort for the general to convince his leader, and the leader also carried a lot of pressure to launch the star missile, but this was still not enough for the general, and then he finally got his wish and personally led the starfleet on an interstellar expedition.

He has survived the long and arduous journey of the interstellar expedition, and he is still very confident that he will survive the last two light years.

Later, the general realized why the researcher at that time was so confused. Later, after a long period of research, the location of the earth's civilization was determined, and the degree of development of the earth's civilization was gradually understood. Feeling that the earth's civilization has technology weaker than theirs, the general led the team to set off. However, gravitational waves are not something that can be controlled by the current earth civilization, and they are also confused about the source of gravitational waves.

They always have a strange feeling that such gravitational waves are like being emitted by an advanced civilization deliberately exposing the earth's civilization, and the purpose may be to guide their discovered civilization to exterminate the earth's civilization.

However, these people in power don't think much about it, suspecting that it is the business of researchers, and making profits from it is what they should do.

So, in this idea, under the secret impetus of the general, the expeditionary plan was put forward in this way.

At the same time, however, there were voices on their planet that advocated peace and opposed expeditions, and they were increasingly opposed to interfering with the development of other civilizations. Of course, the most important thing is that if they go on an interstellar expedition, their planetary positions may also be exposed, which is absolutely catastrophic for them.

In such a big situation, to the general's surprise, the leader actually agreed to their plan and appointed him as the main person in charge. This is definitely a blessing from heaven for the general.

Now they have been on the road for more than ten years, and they have finally received information about the earth's civilization for the first time. However, since they are invading, there is no need to reply to the message.

The star-rated missiles that set off before them were already close to the Earth, and in his opinion, their civilization was almost certain to win.

The general still admires the leader's decision-making, and he also knows that interstellar navigation is indispensable for the further development of civilization.

After such thoughts, the general left the command room with satisfaction and went into a deep sleep.

The rest is to be handed over to the artificial intelligence, if there is no accident, when they wake up again, they will already be close to the edge of the astrolabe, which is the Kuiper belt in the mouth of the earth civilization.