This burst of radio waves has obvious traces of wisdom and civilization. Specifically, it has three cubic repeat bands and five double repeat bands, and there seems to be some logical connection between the repeating bands.

Although there is no way to locate the emission source of this radio wave, with the current information, Xiao Yu can be sure that it is not far away from him.

Xiao Yu's mood became tense, this was probably the first time that human beings had contact with an extraterrestrial intelligent civilization. And if radio waves are received in such a void, it can prove that this alien civilization has at least gained the ability of interstellar voyages.

"It won't be so unlucky, will it?" Xiao Yu muttered silently.

Xiao Yu doesn't think that other alien civilizations will be like himself, and start interstellar voyages when the level of science and technology only reaches the ability of interplanetary navigation. In other words, this civilization is likely to travel at a speed of five percent of the speed of light. This represents an insurmountable technological gap, and Xiao Yu will be a lamb to the slaughter who has no ability to resist in the face of this technology.

Xiao Yu turned the remaining 800-odd spacecraft into radio silent mode, turned off all visible light transmission, and at the same time, turned on various observation equipment to the maximum power.

In the boundless dark universe, Xiao Yu stalked silently.

Xiao Yu began an intense decoding work, trying to translate the signal carried by this radio wave into a language that he could understand. At the same time, Xiao Yu secretly prepared all laser cannons, high-velocity machine guns, hydrogen bombs, etc., ready to fight at any time.

Under such circumstances, Xiao Yu could not escape. Because now, that civilization should not have discovered Xiao Yu yet, and if he escaped, it would mean starting the nuclear fusion engine, and as soon as the nuclear fusion engine started, it would emit strong radiation, and it would almost be certain that he would be discovered by the other party, and then he would become a target.

Xiao Yu could only maintain his current speed, and under the effect of inertia, he slowly slid forward.

Ten days have passed, and during this time, everything is quiet as usual, Xiao Yu just waits in silence, preparing in silence.

Then, Xiao Yu received a second message. This message still shows obvious logical characteristics. These two information receptions finally allowed Xiao Yu to make a rough positioning for the information emission source.

Probably...... This information emission source, in front of Xiao Yu's 800,000 kilometers, is approaching Xiao Yu at a speed of four kilometers per second.

Xiao Yu is approaching Tianyuan 4 at a speed of 550 kilometers per second, which means that this unknown information emission source is also approaching Tianyuan 4, but its speed is only 546 kilometers per second. According to this rate, two and a half days later, Xiao Yu will come into contact with him.

"Is it to run away, or?" Xiao Yu fell into a contradiction.

"Let's parse the information first." Xiao Yu calculated, "With two pieces of information as a comparison, it will take about three hours to decipher its meaning." Wait for the information to be parsed before deciding whether to run away. ”

Xiao Yu manipulated a huge amount of computing power and made a lot of calculations on these two pieces of information. After three hours, Xiao Yu finally cracked these two pieces of information.

"The 7th survey satellite is running out of fuel, the speed is 13.5 kilometers per second, the detection module has been turned off, and the next step is requested."

"The 7th survey satellite has successfully de-orbited, and the communication module is about to be shut down, please confirm."

Looking at these two pieces of information, Xiao Yu fell into deep thought.

From the literal analysis, this is a device called "Sky Survey Satellite 7", which communicates with a console somewhere. Of course, the original text of the information does not say "7 survey satellite", and the general meaning of the original text seems to be that there is some kind of instrument with the number 7 that can fly in orbit. According to the translation of the earth's text, it was translated by Xiao Yu as "No. 7 Survey Satellite".

There was a gap of ten days between the two messages. According to its logic, it seems that after the first message was sent, the console was controlled in some way, and it took ten days to steer the satellite out of its original orbit and shut down its communication module.

There's a lot of information in that.

What Xiao Yu needs to do is to analyze the information he needs from these two short pieces of information, such as the other party's scientific and technological level, such as the other party's social model, and most importantly, whether the other party is a well-intentioned civilization or a malicious civilization.

It's a daunting task, with too little intelligence and too much to analyze. But if it doesn't work, Xiao Yu sighed and started the modeling work.

One social model after another was formed, and then, the models that did not conform to the known intelligence were overthrown, and the models that met the known intelligence were constantly improved, and finally, Xiao Yu analyzed several points of information.

First of all, it is known that this satellite-like instrument was discarded after the fuel was consumed. Then it can be known that in the eyes of this civilization, the cost of recycling this instrument is higher than the instrument itself. This point made Xiao Yu confused.

Since the interstellar voyage is launched, it is inevitable to reserve a large amount of fuel. And a normal operating instrument, there are too many components that can be recycled on it, such as Xiao Yu, after the village-level spaceship is damaged, Xiao Yu will spend fuel to capture it back and disintegrate, recycle the usable parts on it, and will not directly discard it.

"It seems that the fleet of this civilization is in an energy crisis, and this is the only explanation." Xiao Yu thought silently, and his mood became heavy.

Now that this civilization is in an energy crisis, Xiao Yu is in danger. Because this civilization is likely to rob Xiao Yu.

There was another piece of information, "The speed is thirteen.5 kilometers per second", and Xiao Yu was also confused.

"Thirteen.5 kilometers per second?" Xiao Yu pondered, "Since the speed is indicated, there must be a reference, so what is the movement of this instrument relative to?" Normally, it will take at least a year for an instrument to run out of fuel, and it can fly a distance of 400 million kilometers for such a long time, but from the strength of the signal I received, this signal cannot be received by the console 400 million kilometers away. ”

This is a contradiction. Xiao Yu thought carefully and had an explanation in his heart.

"This contradiction can only be explained by the fact that the instrument is moving in a circle around the console." Xiao Yu manipulated the huge computing power and made many calculations in an instant. "But in this case, a new contradiction will arise, under what circumstances will a fleet, need a satellite with a speed of thirteen.5 kilometers, revolving around it all the time?"

Xiao Yu has already calculated that only a star with a mass of 1.6 times that of the Earth will have an orbital speed of 13.5 kilometers.

This is an astonishing conclusion.

"Could it be that the total mass of this fleet is one or six times that of the Earth? That's why a special instrument is needed to monitor the fleet at all times? No, it can't be, the fleets have their own communication systems with each other, so why do you have to get a satellite? Moreover, how could such a huge fleet not recover the fuel of a single satellite? ”

Xiao Yu was puzzled, and he couldn't unify these two contradictory pieces of information no matter what.

In these two pieces of information, there is also a very key word, "detection module".

Obviously, when there are unknown circumstances, the detection module is needed, so under what circumstances does a fleet need to use an external instrument to detect the internal structure?

This is again a point of contradiction.

"I can't figure it out, let's give up here first, and calculate their civilization level first." Xiao Yu thought in his heart.

"First of all, it is certain that they have not mastered super-distance communication, that is, they are not as deep as me in terms of quantum theory. Then, on the energy side, the first message says that the fuel is running out, and then it runs for another ten days before the communication module is turned off, so I can make some guesses about the fuel utilization rate......"

"Assuming for the time being that the instrument is in a circular motion, relying mainly on inertia to maintain its orbit, and from the point of view of its abandonment, its mass cannot be too large, otherwise it cannot be abandoned so easily, and assuming that its mass is ten tons, and then assuming that its fuel is only 0.1 percent remaining, then, from the perspective of comprehensive analysis, ......"

"They're still fusion energy."

Xiao Yu came to this conclusion.

But a new contradiction has emerged. How is it possible for a civilization that uses nuclear fusion as an energy source to build such a large fleet?

One question after another popped up in Xiao Yu's heart.

"Now that this satellite has been abandoned, maybe, I can capture it." In Xiao Yu's heart, an adventurous idea suddenly arose.

After thinking about it, Xiao Yu gritted his teeth and made up his mind.

"! What would not dare! Anyway, there is no way to run now, it is better to find out as much as possible about their civilization, even if they die, they will die vigorously! ”

After making up his mind, Xiao Yu turned on the optical detection equipment to the highest precision, and finally, with the help of the faint starlight reflection, Xiao Yu found this instrument at a distance of 500 kilometers from the estimated location.

It was a strange instrument about a dozen cubic meters in the shape of a starfish.

Looking at this thing in front of him, Xiao Yu was excited. This is Xiao Yu's first contact with an alien civilization!

Xiao Yu controlled a village-level spaceship and approached the satellite with the lowest power. At the lowest power, the fusion engine of the village-level spacecraft emits only extremely weak radiation, presumably not being discovered by the speculated alien civilization. After getting closer, Xiao Yu used a mechanical arm to grab the satellite into the cabin.

It was then transported to the largest and most well-equipped county-level spacecraft for analysis.