This crack that appeared at some point was not Xia Xuan's, and his spatial portal was black, not as colorful as this strange crack. Coupled with the fact that this strange crack was 298.4 billion kilometers away from Yunxing, how could he rush there to drop the spatial portal at this level of distance?

When this crack first spread in the academic world, Xia Xuan also got photos and reports about this crack. But at that time he didn't pay much attention to this crack. This is mainly due to the fact that the current level of technology of the Eastern Xia Empire can only observe this crack and cannot measure any useful data.

The same is true of the nations of the world, where they did find this strange crack, but they couldn't do anything practical and nothing useful out of it. In the face of this situation, no matter how strange this crack is, it will not make the countries of the world invest too much.

Moreover, there is also an Eastern Xia Empire on the cloud star that is eyeing them, so that all countries have no heart to vigorously study this rift.

But this crack suddenly sent a strange signal, and the situation was different in an instant. If there was another intelligent race or some kind of creature on the other side of the rift, the research value of this rift would be increased countless times in an instant.

Now all the countries on the cloud star have begun to study this rift using various instruments, and the main research is to decipher the meaning of this information. While all countries are studying this rift, none of them have responded to the signals sent by this crack.

For the so-called extraterrestrial civilization, all countries in the world are very vigilant, and it can even be said that all countries treat this civilization or creature that sends out the signal directly as an enemy. If an alien civilization really comes to Yunxing, the first reaction of all the countries on Yunxing is not to establish diplomacy or communication. Rather, consider how this alien civilization would fight back if it attacked humanity, and would they have the ability to fight back?

The second thing to do is to ensure that your network has been controlled by alien civilizations, and at the same time set up wired communications to prevent the radio communication system from being interfered with by alien civilizations. Only after taking all the precautions they can do will humans try to negotiate with extraterrestrial civilizations.

Just like the "Future Universe" written by Emperor Xia Gong of the Great Xia civilization, it gives several speculations about the social structure of the universe.

……

The Law of the Dark Forest of the First Universe. [Note from the three-body problem]

The universe is a dark forest, and every civilization is a hunter with a gun, sneaking through the forest like a ghost, gently brushing away the branches that stand in the way, trying not to make a sound from his steps, and even breathing carefully: he must be careful, because the forest is full of hunters who are just like him, and if he finds another life, there is only one thing he can do: shoot and destroy it. In this forest, others are hell, eternal threats, and any life that reveals its existence will soon be wiped out.

The second order of the cosmic society.

The society of the future universe may also be an orderly society built by several super civilizations, and all civilizations will develop and survive in the order set by these super civilizations. And these super civilizations will form three different camps, and all civilizations must join a certain camp.

These super civilizations have built a cosmic society full of order, and at the same time, they are also holding each other back, competing with each other, and trying to surpass each other. At the same time, they will also unite to cut off the upward path of other civilizations, so that the growth of other civilizations will stagnate at a certain stage, and they will not be able to become civilizations of their magnitude

Third, there is no social universe in the wilderness.

The entire universe is still in the barbaric era, no civilization has established order, and all civilizations are exploring this vast and boundless universe in their own way. There is not even a single civilization that exists individually, all civilizations are just speculating about this universe, and it is likely that there is an intelligent civilization somewhere in the universe that is the same as them. And when civilization reaches a certain point in exploring the universe, it is very likely that the two sides will meet at some point and discover each other's existence. The next way for the two civilizations to communicate is war or peace, and it all depends on the difference in power between the two sides.

The universe is so big that there are no surprises. The above three types of cosmic societies are just my guesses, but no matter which type they are, please remember that before human technology left the planet. Don't try to reveal your location, even if it's a message from the other person.

I'm not sure how far human civilization will go in the future. Will human civilization be destroyed by itself? Will human civilization encounter extraterrestrial civilizations? The only thing I am sure of is the original sin of weakness, and not to try to speculate on extraterrestrial civilizations from the perspective of human beings.

Sometimes, it can be a whim for alien civilizations to destroy humanity, just as we humans accidentally trample an ant to death.

……

The three ideas put forward by this book are highly recognized by the whole world, and the conjectures of these three cosmic societies have laid the foundation for all science fiction works on the clouds. Whether it is a film or television work, or a game, or anything related to the universe, it will more or less refer to the book "Future Universe".

"System, what is this?" Xia Xuan asked, if he didn't understand, he would ask the system, this was a good habit he had always cultivated.

[Because the distance is too far, it is beyond the detection range of the system, and the system does not know what the crack is]

"Don't you know?" Xia Xuan's index finger tapped on the table and began to think about whether to change his next plan.

If the other side of this rift is really an alien civilization, the best outcome is that the other party is just like humans now, and there is no way to carry out interstellar navigation. In this case, we can consider conducting technical exchanges with this civilization and learning from each other.

If this civilization enters the interstellar age, then whether to communicate with this civilization or not must be carefully considered.

"Xia Soul, start to launch the underground city plan, gradually unseal the underground nuclear war shelters in major cities, and let the relevant departments prepare." Xia Xuandao.

The next moment, a cold electronic synthetic female voice sounded [Yes, I will do your bidding]

In order to prevent the enemy's nuclear attack, the underground city plan will completely lose order or even destroy the entire Great Xia civilization. Both the Eastern Xia Empire and the Southern Xia Democratic Republic built huge shelters that could accommodate tens of millions of people under major cities in the country, and if there was a possibility of nuclear war between the country and other countries, the government would organize some people to take refuge in them.

After 30 years of construction, all the underground cities were gradually completed. As peace was restored to the world, these huge underground cities gradually evolved into underground shopping streets. At the same time, the Eastern Xia Empire and the Southern Democratic Republic continued to expand the underground cities, until today, the underground cities of major cities can accommodate 30 million people.

In normal times, some of these underground cities can be converted into cheap rental houses, or they can be used as shopping streets, and they can also set aside an area on the spot to build an underground transportation network. Even the Eastern Xia Empire intended to build an underground transportation network that would connect all the underground cities. However, due to the huge workload of this project, and the fact that the Eastern Xia Empire had no way to easily solve all kinds of harsh conditions underground, this plan was shelved.

In the event of war, the underground city will become a refuge for the population, who will be subject to military control. All the people will enter into a temporary collectivization for the sake of the country to win the war. These underground cities will become huge arsenals from which a steady stream of soldiers and weapons will be produced.

In just a few seconds, the major cities of the entire Eastern Xia Empire were in charge, and the relevant departments of the underground cities received orders.

After Xia Xuan dealt with this matter, he began to check the situation in the other world.

【Teigu Research Institute has produced the first batch of Teigu】

【The Church of Knowledge changed its name to the Church of Science】

[The Brave handed over the Holy Sword and the Sage Armor to the Eastern Xia Empire, and in the current situation, it seems that the Brave has lost all his strength in order to avoid the control of the dice of fate. 】

[After continuous research, the magic potion extracted from the blood of monsters will cause a certain amount of mental confusion, and it is not advisable to consume too much. 】

[The Wizards' Guild began experimenting with the creation of a high-latitude energy reservoir by researching the Ice Knight of Estes. 】

[Tazmi and Red Hitomi joined the God-making Project]

……

Half an hour later, Xia Xuan, who was dealing with various things in the other world, felt something in his heart, and slowly raised his head to look at the door.

At this moment, a dark-haired girl walked in from outside. The girl was wearing a pale yellow dress, her facial features were very delicate, and there was a hint of indifference between her eyebrows. The girl's temperament is full of royal luxury, and at the same time there is a hint of martial artistry.

The girl walked to the center of the hall, bowed to Xia Xuan, and said, "See Your Majesty." ”

Xia Xuan saw the girl and smiled slightly, "No courtesy." ”

As soon as these words came out, the girl immediately straightened her waist, her attitude changed 360 degrees, and said, "Xia Xuan, my parents went over to have lunch with them." ”

Seeing the change in the girl's attitude, Xia Xuan pulled the corners of her mouth and said, "You girl, you still don't know the rules." How many times have you said it, you have to call my brother on weekdays. ”

This girl's name is Xia Ling, and she is Xia Xuan's sister, a martial arts maniac. Since childhood, he has been very obsessed with various martial arts, and at the age of 17, he learned no less than three martial arts and was proficient in all of them.

In memory, the relationship between Xia Xuan and this sister is at two extremes. When he was a child, Xia Ling was Xia Xuan's follower, no matter where he went, Xia Ling would follow him closely, and the relationship could be said to be very good.

And when Xia Ling went to junior high school, everything changed. Xia Ling entered a rebellious period, and he was impatient with Xia Xuan's brother, and he no longer followed Xia Xuan as before. Sometimes I become very childish because of some trivial things, and I always have to do the opposite with Xia Xuan.

Hearing Xia Xuan's title, Xia Lingxiu frowned slightly, her expression was a little displeased, and she said, "I'm almost 18 years old and an adult, don't call me a girl anymore." ”

Hearing this, Xia Xuan glanced at Xia Ling, and indeed grew up to be more than one meter tall.

Xia Ling took two steps back, his delicate face revealing a very obvious disgust, and said, "Disgusting." ”

"If you talk to me like that, you will be sentenced." Xia Xuan's eyes narrowed slightly, he planned to scare this girl who was still in the rebellious period.

"Xia Xuan, you just asked me to be exempt, you have no jokes." Xia Ling said confidently.

Seeing that there was no way to scare this girl, Xia Xuan waved his hand and said, "You go back and tell your parents first, and when I finish dealing with some things, I'll go over immediately." ”

Then he put his gaze back on the virtual screen next to him, Xia Ling didn't say anything more, and turned around and left the main hall.

。