This wave of space fluctuations is indeed very weird, generally speaking, there must be something before it can cause space fluctuations, whether it is a planet or a spaceship, in short, there must be something first, but in this space fluctuation, Xiao Yu did not observe anything.

It was empty, a cosmic void.

There was clearly nothing there, but Xiao Yu received this message. The existence that seemed to be completely invisible sent Xiao Yu such a message: "I'll give you something." ”

"What is this?" Xiao Yu was surprised in his heart, "Something that is completely invisible in the optical band, electromagnetic band, and tachyon detection band?" It's incredible. ”

Xiao Yu had been in contact with the Guardian Civilization's flagship Radiance, and the Techno-Taihao's Meson spaceship, which was in that weird binary star system, and it was in that galaxy that Xiao Yu got the Ball of Death, a massive killer weapon against carbon-based civilizations. But whether it is the Guardian Civilization Glory or the Technology Taihao's Meson, Xiao Yu can be detected with a tachyon detector. However, the tachyon detector, in the face of this unknown existence, actually failed.

The Guardian Civilization and the Taihao Civilization are both sixth-level civilizations, so does this mean that this unknown existence that came here at this moment has already exceeded the sixth-level in strength?

This made Xiao Yu faintly worried in his heart.

"Give me something? Who entrusted you? Give me something? After thinking about it for a while, Xiao Yu cautiously sent a reply, "Also, how do you know that I am here?" ”

The completely invisible being responded quickly, but in the blink of an hour, the spatial fluctuation message that represented the unknown location of the being. Hundreds of millions of kilometers closer. However, it stopped when it reached the point where it was still 30 billion kilometers away from the main star of this star system, and no longer approached, as if to avoid irritating Xiao Yu.

"The person who entrusted me didn't tell me the rest of the information, it just told me that after I handed this thing to you, you would understand." The unknown being replied, "I am a space creature and am sensitive to any spatial fluctuations, and I have found your location by tracking your spatial fluctuations. ”

"Space creatures?" Xiao Yu was slightly puzzled in his heart. But I didn't have time to dig deeper. Because Xiao Yu saw that after the unknown creature sent that message, there was something that had approached his position.

Xiao Yu was still very wary. In order to prevent this thing from being a weapon of mass destruction or something, it exploded after approaching the gathering place of its own spaceship. will bring danger to himself, Xiao Yu controls a small spaceship. Quickly approached the thing.

Xiao Yu intended. Use a small spaceship to briefly study this thing, make sure that there is no danger, and then bring it back to your spaceship gathering place.

That thing seemed to have some kind of induction, and after Xiao Yu's small spaceship approached, this thing stopped, allowing Xiao Yu's spaceship to keep getting closer and no longer move.

Wait to get closer. Xiao Yu saw clearly what this thing looked like.

It was a small rectangular box, about half a decimeter high, three decimeters long, and one decimeter wide. Under the illumination of high-intensity searchlights. The small box was black with a silver glow, and on top of it, there were some strange symbols, which seemed to be some kind of writing. Some of these characters are larger, while others are smaller. They seem to be arranged according to some aesthetic principle, and the arrangement of several lines of text seems very harmonious.

"What is this?" Xiao Yu's curiosity came out again. Xiao Yu manipulated the small spaceship to continue to approach, and then sent a robot equipped with power to approach the small box, intending to capture it into the spaceship's cabin.

Inside the cabin of this small spaceship, Xiao Yu is equipped with some simple detection instruments, which will do some preliminary analysis for this thing.

But when it got closer, and after the optical detection equipment on the robot could clearly see the words, Xiao Yu stayed here.

Xiao Yu recognized it at a glance, those strange symbols turned out to be the English alphabet of the Earth Age.

Xiao Yu is very familiar with English, in the earth age, Xiao Yu often has to study some scientific and technological archives or documents written in English, the most authoritative scientific journals are also written in English, it can be said that in the earth era, if you want to understand the forefront of science and technology, the latest developments, it is impossible not to master English.

So Xiao Yu quickly recognized these lines of letters.

"This, this is actually a tie? This little box, is it a tie box? At this moment, Xiao Yu had a feeling of absurdity to the extreme.

A magical, stealthy existence that can be under the tachyon detector, it is speculated that the strength will not be lower than that of Taihao or the powerful existence of the guardian, I don't know how long I have been tracking myself, and I came here just to give myself this thing? And most importantly, according to this unknown being, it came here because it was "entrusted by someone". So, who would do such a thing?

Xiao Yu thought of many things in a flash.

"Something like a tie is unique to the civilization of the earth, at least, there are more than a hundred types of intelligent creatures under my command at this moment, but I have not found any race that has the habit of wearing a tie. Could it be ...... This thing was given to me by someone from the earth, or someone who is closely related to the earth? ”

"And to be able to drive such a powerful existence and let it be handed over on its behalf, how strong does it take to back it up?"

There may be a lot of things behind this, and even some things are so amazing that Xiao Yu doesn't dare to speculate.

"Let's take a look at this thing first." Xiao Yu thought silently.

"Actually, I'm curious, too." The unknown being said, "I felt strange when it gave me this thing, because I couldn't imagine what it was. It's just a mixture of simple elements, with carbon as the main element. Its strength is so low that an impact of interstellar dust can knock it through, and its ignition point is so low that it can be destroyed by a temperature of a few hundred degrees Celsius. It doesn't even have any merit, at least I can't think of any good. So what is such a thing for, that person would entrust me to travel millions of light-years to get it here? ”

Xiao Yu was manipulating the robot to capture this small box, and after hearing these words, Xiao Yu's heart shook violently, and there was a feeling of shock and even horror, which instantly occupied Xiao Yu's mind.

"You, what did you say?! Traveling millions of light-years away? Where are you from? You're from an extragalactic galaxy and you're not native to the Milky Way? Are you a level 7 civilization? ”

This is obvious. Xiao Yu was already sure that even a sixth-level civilization did not have the ability to sail the river system because of the limitations of energy. It has nothing to do with how much energy reserves you carry with you. Even if a level 6 civilization carries a star as an energy reserve on a river voyage, the star will be completely consumed before reaching its destination. The reason is simple: the more massive the mass of the material to navigate the curvature, the more energy is consumed. The relationship between the two is directly proportional.

Xiao Yu once made a simple calculation of the energy required to sail a distance of 1.5 million light years in curvature. The results of the calculations show that the amount of energy consumed on such a voyage is 1.7 times the total mass of the fleet. In other words, if a certain fleet carries up to 70 million tons of material reserves, plus the mass of the spaceship, the total mass of the entire fleet is 100 million tons, then the total energy required to sail 1.5 million light years is converted into mass, which is 170 million tons. Even if all the materials in this fleet, including the reserve energy, the ship's hull, and all the creatures in the ship, were not enough, how could they sail far under such circumstances?

Even if the mass of a star is 100 trillion tons, then the total mass required to make the star travel 1.5 million light years is 100 trillion terabytes multiplied by 1.7 trillion tons, which is 170 trillion tons.

Therefore, such a trip to the river system has nothing to do with how much material replenishment a fleet can carry, even if it pockets the entire galaxy as a reserve, it is still not enough to start a long voyage.

Before breaking through the shackles of sixth-level civilization technology, it is impossible to launch a river system voyage, which is a basic cognition of Xiao Yu. Of course, taking an extreme approach might circumvent this restriction, but Xiao Yu believes that no civilization should be so crazy.

That is, instead of using curvature navigation, it is simply used for river-level voyages using conventional navigation. It is important to know that conventional navigation can always rely on inertial navigation after the initial acceleration stage, and inertial navigation does not consume energy.

Conventional navigation means extremely long time, for example, using 200,000 kilometers per second of conventional navigation, it takes 2.25 million years to complete a voyage of 1.5 million light years. That's a desperately large number.

But the being in front of me said it was millions of light-years away. Then there is only one explanation, this guy is a seventh-level civilization, even if it is not a seventh-level civilization, it is at least an existence that surpasses the sixth-level civilization.

"No, I'm not a seventh-level civilization." The guy replied. (To be continued......)