The most important sign of a seventh-level civilization is that it can draw energy directly from space. Based on this, there will be a lot of incredible technologies developed in the seventh-level civilization. Faster curvature speed, space bombs in the true sense, even stargates, spaceships with small bodies but huge space, and even the direct transformation of extreme stars such as neutron stars through space technology will all be studied by the seventh-level civilization.

At this time, Xiao Yu finally understood why there were so many different classifications of seventh-level civilizations, the reason was very simple, there were too many technologies that could be studied by seventh-level civilizations, so much so that all the scientific researchers of an entire civilization contributed all their energy and spent endless time, and they could not achieve the ultimate achievements in one of the directions, let alone study the rest.

Therefore, the seventh-level civilization will choose a research direction as its main direction of attack, and because of this, there are different seventh-level civilizations such as the seventh-level civilization in the space direction, the seventh-level civilization in the travel direction, the mechanical direction, the microscopic direction, and so on.

Xiao Yu also began to think about which path he would take in the future at this time. As far as the currently known types of civilization are concerned, the microscopic direction and travel direction, as well as the direction of music and architecture, were excluded by Xiao Yu without hesitation. There is no other reason, just because the combat effectiveness of this type of seventh-level civilization is too low. Then among the known types, there are three options: the spatial direction, the extreme star direction, and the mechanical direction.

Combined with his own advantages, Xiao Yu thought about it, but did not come to a conclusion.

"Don't think about it so much yet, the mystery of the seventh-level civilization hasn't been fully revealed in front of me, let's think about this after I have fully mastered the formula of empty energy." Xiao Yu thought, "Maybe because of my advantages, I can choose many directions to develop together at the same time." I'm no ordinary intelligent civilization. As long as I can make another breakthrough in my computing power, I can have more powerful scientific research capabilities than several seventh-level civilizations combined. Developing in multiple directions at the same time is not something impossible for me to do. ”

Xiao Yu is nervously analyzing the scientific data he has obtained during the super-accelerated experiment. The space-energy formula is not just a simple formula, behind it, there are countless other formulas, and these many, many complex formulas can be deduced after rigorous mathematical and logical operations.

In fact, the void energy formula itself has no value, its value lies in the meaning behind it. It's like opening the mass-energy formula of the second-level civilization, E=MC^2. If you tell primitive people about this formula, primitive people are still primitive people, and it will not become a second-level civilization just because it knows the mass-energy formula.

Einstein was based on the science and technology of the time, and based on many other formulas and theorems. Finally, the derivation of the mass-energy formula was completed. Its value lies in its scientific thinking. And not the formula itself.

It is not that if you master the mass-energy formula, you will become a second-level civilization. But after having the qualifications to become a second-level civilization, it will inevitably master the formula of mass and energy. The same is true for the aerokinetic formula. Therefore, although Xiao Yu has not yet mastered the formula of empty energy, Xiao Yu's science and technology, with the help of a large amount of information obtained in this experiment, has also made great progress.

A large number of other formulas were discovered and then determined by Xiao Yu. And it is used in its own scientific and technological system. The more such a formula is discovered, the closer we are to mastering the air-energy formula. Wait until the day when Xiao Yu fully deduces the void energy formula, that is, when Xiao Yu really becomes a seventh-level civilization.

The seventh-level barrier has been broken by Xiao Yu. The most serious obstacle to Xiao Yu's scientific progress has disappeared.

On the way back to the Ursa Major dwarf galaxy, Xiao Yu once again experienced an era of great technological development. After the seventh-level barrier disappears. There has been a great improvement in science and technology in all aspects. Computational science, biological science, materials science, energy science, etc., almost every day there are new breakthroughs and new scientific research results.

"I've found a way to destroy the Neutron Battlestar, so in the future, let's focus on this research." Xiao Yu thought silently.

Space can be converted into energy, into matter, then matter, energy can naturally be transformed into space. After unifying space, energy, and matter, Xiao Yu has the ability to make these three interchangeable. Xiao Yu is developing a new weapon that will have the ability to convert a part of a neutron battle star into space, and in this way, completely destroy a neutron star.

"The Neutron War Star is a seventh-level civilization creation, and there will definitely be devices on it to guard against various seventh-level civilization weapons, but its controller is a sixth-level civilization, which will inevitably cause some of its functions to be ineffective and unusable. And now I am only one step away from a seventh-level civilization, and it is no longer impossible to deal with a seventh-level civilization weapon that is mastered by a sixth-level civilization. ”

"I will keep my promise, Pegasus, and after I destroy the Sweeper, the galaxy will be your paradise. You will be the most powerful being in the galaxy. ”

After experiencing the invigilator's gaze, Xiao Yu completely gave up his plan to conduct a second super-accelerated experiment, or tell the rest of the civilization about his research results. The reason is simple, doing so has the potential to attract the attention of the invigilator again. In the first time, he escaped by luck because of Chen Mo's help, but what about the second time?

Xiao Yu couldn't take this risk.

"It's up to you to break the seventh-level barrier, and I can't help you in this regard." Xiao Yu thought, "The entire galaxy is yours, and you have endless development time to slowly find a way to break through. ”

Hundreds of years have passed, and the Ursa Major dwarf galaxy is just around the corner. At this time, Xiao Yu sent out a space broadcast to inform the Pegasus civilization of the news of his return.

The leader of the Pegasus civilization immediately replied: "My dear comrade-in-arms, you have finally returned. You've been gone for almost 800 years, and it's worrying that you haven't heard from you for so long. How are you doing now? Has it ever become a level 7 civilization? ”

"I'm fine now. I have succeeded eighty percent of the time, and if there are no accidents, I will become a true seventh-level civilization within the next two thousand years at most. Unfortunately, for some special reasons, I am not able to tell you about my research results. To become a seventh-level civilization, it depends on your own efforts. ”

"I had expected this outcome for a long time. If the seventh-level civilization can unscrupulously support the rest of the civilizations, then our universe will not be full of seventh-level civilizations long ago. Pegasus civilization said with a smile: "Our civilization has long been mentally prepared to rely on its own strength to impact the seventh-level civilization. ”

"What happened to my people and the beasts?" Xiao Yu asked.

"They are very good, in the small universe of our civilization, they are well taken care of. It's just that your people seem to be a little unhappy, and the literary and artistic workers in our civilization have conducted some research on the interests and hobbies of your intelligent creatures based on the materials you have left behind, and have produced a lot of video materials based on these studies, but these things have never been able to make your people happy. Pegasus replied apologetically.

"It's okay, tell my people, I'm back." Xiao Yu said with a smile.

During the conversation, Xiao Yu's footsteps never stopped. In a short period of time, Xiao Yu's fleet arrived at the station of the Pegasus civilization. The sun, as well as the planets revolving around it, left the small universe of the Pegasus civilization under the protection of tens of thousands of spaceships and flew towards Xiao Yu's small universe.

Xiao Yu opened the teleportation channel of the small universe and once again incorporated the entire solar system into his own small universe.

A small spaceship quickly left the Sun stellar battleship and rushed towards the position of Mars in the solar system. It quickly passed through the Martian atmosphere and reached the surface of Mars. A figure was gradually being observed by Xiao Yu, who was standing on the highest mountain on Mars under the protection of Lina, with her head raised and her face full of hope.

The small spaceship stopped less than 100 meters away from Zhang Shengya, the virtual projection equipment was turned on, and the figure of Xiao Yu with a smile on his face gradually appeared. Xiao Yu's figure stood in the void, and then slowly walked towards Zhang Shengya and Lina, who were standing on the top of the mountain, and under the gaze of Zhang Shengya's big eyes full of tears, they tightly protected her.

"My people, I have succeeded, the goal of becoming a seventh-level civilization is no longer far away for me, and I have finally taken the most important step in our human civilization. And you, Lina, thank you, thank you. ”

The three of them hugged each other again.

"Let's go, I'll take you home, back to our hometown, and destroy the Neutron Warstar, the Sweeper civilization, and then I'll lead you on a more distant journey to make our civilization stronger."

"Goodbye, leader, I'm going back to the galaxy. When I wipe out the Sweeper civilization, I'll send you a message. From now on, the galaxy will be yours. ”

"Xiao Yu, are you leaving the galaxy?"

"Yes, a river system can't make a seventh-level civilization stay for a long time, and the cosmic star sea ahead is the battlefield of a seventh-level civilization. After destroying the Sweeper civilization, I will leave the galaxy. If there is a fate in the future, I believe we will meet again. ”

"Goodbye...... Goodbye ......" (To be continued......)