Xia Yuan, the commander of the E layer, received a bullet train accident case reported by the 9th District Police Bureau. Under normal circumstances, this should have been characterized as an accident-accident, but because the identity of the deceased was too special, the situation was finally summarized in Xia Yuan's hands.

The deceased was Zhu Yingxin, the daughter of the late famous physicist Zhu Zishuo. Zhu Zishuo is a physicist that the coalition government has been focusing on in recent years, and he is famous not only for his strong logical deduction and theoretical research ability in physics, but also for his ability to quickly transform theoretical research into practical application after a breakthrough in research results. Previously, the government had considered inviting Zhu Zishuo to participate in the study of the conceptual weapon star warship. Unfortunately, the physicist died in his laboratory not long ago, and the police later identified the cause of death as an experimental accident. A great physicist died young, leaving behind a young daughter. As far as Xia Yuan knows, Zhu Yingxin has been influenced by her father since she was a child, and she is also quite researched in physics, and in just one year in school, she has published a number of research papers that have impressed physics scholars, and scholars in the physics community have great expectations for her.

The scene of the accident left behind what she was carrying at the time of the accident. Includes a stack of documents scattered on the floor. In the report submitted by the police, the content of this information was highlighted.

Xia Yuan saw a word inside, "time machine". He pursed his lips in disbelief.

But after reading the entire document in its entirety, he couldn't sit still. In his early years, the focus of his studies at the Military Academy was physics, and although he had not been exposed to it for a long time, he also knew a little about physics. As early as more than 400 years ago, the most famous physicist of the twentieth century, Albert Einstein, proposed the theory of relativity, there was a brief description of the problem of time regression, according to the theory of relativity, time will change with the change of speed, when the speed is close to the speed of light, time will be infinitely close to stop. This theoretically explains the possibility of time travel, but due to the limitations of human beings, more than 400 years have passed, although human beings have improved rapidly in the overall level of science and technology, but the speed of various machines has never been able to reach the speed of light standard in Einstein's theory of relativity, which represents the fastest speed in the universe, seems to have become a gap that human beings can never overcome.

But in this report's statement about Zhu Yingxin's time machine, Xia Yuan found that Zhu Yingxin bypassed Einstein's conclusion and solved the problem from another angle. In the end, a breakthrough in this impossible technology was theoretically completed.

Although it has not yet been applied in practice, it is not easy to achieve such a major breakthrough in theory alone. Xia Yuan was very shocked by this, and he understood the reason why the police urgently reported all the report documents to him after processing the information.

The secrets involved in this are of great significance to all mankind. Xia Yuan immediately thought of the possibility of this technology being applied to the operation to deal with the "black body" incident. He hurriedly connected the communication with Hua Chengyu, the supreme consul of the government.

Two hours later, he stood in front of Hua Chengyu with all the information about this technical research report.

According to Zhu Yingxin's report, Zhu Zishuo's research on the time machine was not caused by a whim, according to her recollection, when her father first mentioned this plan to her, after she expressed her impossibility of this plan in practice, Zhu Zishuo immediately confidently rejected her opinion. He showed his daughter what he had found.

Zhu Zishuo took out a very inconspicuous irregular stone from the laboratory. Zhu Yingxin took the stone and tossed it in her hand, the weight of the stone seemed to be amazingly large, and she almost didn't hold it. Zhu Zishuo told her that it was a meteorite block that a friend of his acquaintance had found somewhere on the F floor. The weight of this meteorite itself is not large, but it has a singular property that can form a powerful gravitational field in a small space around the meteorite, in which the gravity of the space matter will be ten times that of the normal gravity on Earth. This may seem like an inconspicuous number, but when a large number of meteorite blocks are placed together, gravity will form a superimposed effect, and when a large number of stones are placed together, the gravity will reach the tenth power of the corresponding number of stones.

In Zhu Zishuo's years of research, he inherited a concept of time that has been carried over, that is, gravity is a way to slow down time, and when gravity reaches an order of magnitude, the flow of time will be almost equal to zero.

On this basis, he imagined whether it was possible to completely collapse the time rules in the gravitational field by continuing to enhance the gravitational superposition of the gravitational field on the basis of infinity, and reshape it under the guidance of certain technology, so that the phenomenon of time reversal in the gravitational field could occur. Reuse the possibilities of technological development and eventually send humans into it.

In fact, in his later experiments, the direction of the experiment did not fully match his assumptions, and when the gravitational field was superimposed to an almost infinite size, the small gravitational field in the laboratory collapsed, creating a "small black hole" with a diameter of up to two meters. Since then, Zhu Yingxin has studied the "little black hole" created on the basis of her father. She first tried to transport some matter into the gravitational field, and found that the matter was not affected by the huge gravity of the gravitational field, and it passed through the "black hole" unharmed.

After repeated experiments, she began to study the situation, and according to the situation of the "black hole", the near-infinite gravitational field around it would logically tear apart any kind of matter that enters it, but the matter that is sent into it is actually unharmed. She finally put forward a conjecture, which she named "irregular adaptor theory", that is, the huge gravitational field formed by a huge number of meteorite blocks caused the space within a certain range around it to collapse, so that the gravitational field became a macroscopic "small universe", and all the components of this "small universe" are actually this "black hole", so relative to the outside world, the gravitational field around the "black hole" is already the scope of another world concept relative to the laboratory, which is actually equivalent to the parallel universe in the physical definitionSince the matter transported in does not belong to this universe, and is therefore not affected by the rules of time and space in this universe, compared to these foreign substances, this small universe is likely to only assume the role of a tunnel, that is, to send these materials back to the original world.

She gradually began to send some live animals into the "black hole" of the gravitational field, and installed positioning instruments on these animals, she hoped that through this means, she would know the whereabouts of these creatures entering the "black hole", and if they did not leave the earth, then the locator would definitely show their specific position, so that she could find them herself to understand what happened after they entered the "black hole". If there is a wormhole tunnel inside the "black hole", then it is possible to achieve the phenomenon of time reversal in the internal motion.

Her conjecture proved to be correct, and within a few hours of the creatures entering the "black hole", she received signals from locators on the animals, in different locations, but all of them were displayed in the F layer. Regardless of the danger of war, she personally went deep into the various locator signal display locations on the F floor.

These creatures have been fossilized, and she brought the fossils back to layer A for examination, showing a variety of times and ages, the oldest of which is tens of millions of years ago.

She was pleasantly surprised by the success of this experiment, and the reversal of time was confirmed in practice. The remaining problem is the uncertainty of time regression in the "black hole". In later experiments, she found that although the gravitational force inside these gravitational fields is almost infinite, it still shows its imbalance to a certain extent, and she tried to adjust the different positions of these meteorite blocks, and found that the gravitational field size of the different directions to which the meteorite blocks belong is different. After numerous failures, she finally managed to achieve uniform control of the gravitational field, and finally recorded the bearings of the meteorite blocks into a table.

She sent a "black hole" in a homogeneous gravitational field to a group of animals of the same age and morphology. This time, the meteorite found in the follow-up showed a surprisingly consistent time and age.

Zhu Yingxin was thrilled by the successive major advances, and she felt that she was one step away from the eventual realization of this technology.

In the end, the key lies in the control of time backtracking. The reason why the time machine is called a machine is that it has the debuggability of a machine, and the degree of time backtracking can be artificially grasped, which is its magic.

The "black hole" formed by the gravitational field, although it has been proved in practice that there is a feasibility of time regression, but there is uncertainty about the size of the degree of regression, no one knows what the state of this world will be when they return to this world after entering it, and the gravitational field is fixed, once the time regression is completed, then the consequences will be irreversible, then the meaning brought by the time machine will no longer exist, and going back to the past will become a 100% certain risk, that is, non-returnability.

She needs to artificially control the time regression ability of the gravitational field, that is, to control the time regression, and make this gravitational field transfer to a device that can be moved, so that the time reversibility can be achieved, and the user of the machine can not only go back to the past, but also to the present and even to the future.

As long as the design of the device is feasible and there are no technical problems with carrying the machine, it will be easier to retrace time.

The flow of time in the gravitational field outside the "black hole" is stationary, so once a person is in the gravitational field, because it is not affected by the space-time rules of this world, it will not be sucked by the "black hole" with huge gravitational force, and at the same time, due to the staticness of time in the gravitational field, even if the outside world is vicissitudes, the space-time inside the gravitational field will not change, so the function of the human body in it will not actually change, and the feeling of the actual time scale will be greatly shortened or even close to nothing. As a result, the reversibility of backtracking is realized.

She finally shrunk these meteorite blocks into an alloy cube with a volume of only one-tenth of a cubic meter through nano-scaling technology, and through continuous adjustment, the degree of time backtracking can be controlled in a tiny scale, and as long as she tries to adjust the time span of the scale, she can retrace time or travel quickly to varying degrees.

"There seem to be some obvious and important details missing from this profile." Hua Chengyu raised questions after reading it.

As for the origin of the large number of meteorites obtained by Zhu Zishuo, the information only briefly mentions that the place where it was found is in the F layer and is provided by his friend, but does not specify where the discovery site is, and does not specify the specific identity information of the provider. At the same time, in the report, Zhu Yingxin has made a lot of descriptions of the previous series of theories and experimental data, but the last important link, that is, time debugging, is used to explain very simply, and it can even be said that it is a brushstroke.

"Looking at the statement of the report, it seems that Zhu Yingxin has designed the corresponding sample." Hua Chengyu opened the teacup on the table, and the white smoke slowly rose upward, exuding a unique fragrance of tea.

"Indeed, soon after receiving this report, I immediately notified the personnel of the Countermeasures Bureau on the E floor to go to Zhu Yingxin's residence and her laboratory to investigate, and indeed found the things mentioned in the report. Now the sample is being studied at the Research Center of the Countermeasures Bureau, and researchers are analyzing it. ”

"Inform the military leaders of all levels that I have something to do with them, and ask them to come to the command center of the headquarters of the countermeasures bureau on the A floor. Remember, only the top military head is notified. Hua Chengyu turned on the communicator on the table.

He looked up at Xia Yuan again. "Let's go."

The workers of the research center of the "Black Body" Countermeasures Bureau of the United Government expressed great surprise at the practical feasibility of the time machine, and through repeated experimental verification, it was finally proved that the time machine does have its unique performance.

The discovery of the time machine has set off a storm in the military leadership of the coalition government. In the discussions of military leaders at all levels, the focus on its application in the field of countering "black bodies" has mainly focused on the great uncertainties and risks that this plan brings.

At present, the feasibility of the application of the time machine has been confirmed, according to the plan proposed by Hua Chengyu, the government will organize the corresponding personnel to go back to the past through this machine, to find the initial source of the "black body" incident, that is, the reason and time node for the initial penetration of the "black body" into human society, and to look for the possibility of obliterating the "black body" in advance. Once the plan is successful, then the threat of "blackbodies" will completely cease to exist.

But the problem is that, although it is feasible in practice to go back to the past, it is impossible to predict what the consequences of what will be done after returning to the past, and even whether the impact on the past will produce a corresponding time paradox. For humans, this method is equivalent to a gamble, and a slight mistake will cause irreparable consequences. The crazy move to change the past is tantamount to violating the normal rules of time and space in nature, and what the consequences will be, and whether it can correctly meet the government's and even all mankind's predictions, is actually very uncertain. Time travelers can have a huge impact on the original future world while going back in time, even if they just break a flower or a grass.

The worst-case scenario is that due to the drastic changes in the original history, which eventually leads to the collapse of the existing rules of time and space, then the entire world may be reduced to nothingness, or even completely wiped out in the long river of history, and it is very likely that because of this, the gears of time will be retraced back to the era in which the traveler lived, so no matter how the traveler uses the time machine to travel to the future, he will never be able to return to the world when he first set off. Because that world has been completely erased by the laws of time and space.

This action is as if human beings are deciding their life and death by flipping a coin.

Either way, there are only two endings, survival or death.

There is no historical indication that humanity has ever done such a crazy thing. Therefore, under the existing circumstances, any assumptions made are just wild or even unfounded speculations, and human beings in three-dimensional space, like ants in two-dimensional worldview, are not yet cognitively unable to clearly understand the concept of four-dimensional or even five-dimensional and six-dimensional.

The government does not yet have a concrete idea of what the consequences of the application of the time machine will be.

Three months later, the coalition government received news of the total annihilation of the Eastern Fleet.

Once again, the Ruins Continent launched a massive sonic attack on the waters near it. This time, the sonic attack encompassed nearly half of the Pacific Ocean. The Eastern Fleet base in Guam was also within the scope of the impact, and all the officers and men of the Eastern Fleet, including Vice Admiral Jiang Hailing, were martyred. The disaster spread to the former Japanese island of Kyushu, and after a rapid infrasound wave flow swept through, the entire Kyushu island fell into a dead silence.

Chen Yuepeng announced this news to the people of the F layer, and in addition to keeping the "black body" still hidden, the Confederate government released all the threat information about the ruins continent and prehistoric civilizations.

In the "blackbody" infected area display at the headquarters of the Countermeasures Bureau, the total number of infected people in the five layers under the control of the coalition government was only 10 million four months ago, but after only three months, the number has soared to 100 million. More than 100 million infected people are still lurking in the human community, waiting for more of their kind to emerge.

The six senior military consuls of the coalition government have finally made up their minds. They knew that they couldn't wait any longer, if it was a war between humans and prehistoric civilizations, then this war had shown a crushing situation from the beginning, and human beings seemed so weak in the face of the powerful strength of prehistoric civilizations.

This machine is the last card that humans can play.

The coalition government eventually passed and launched the "Retrospective" plan. According to the plan, the coalition government will send 1,000 elite members from the personnel of the Bureau of Countermeasures, who will use this time machine to go back to the year 2102, the year when prehistoric civilizations were first discovered in the depths of the Mariana Trench, to investigate the details of what happened after the discovery of prehistoric civilizations in the existing records, to find opportunities to prevent this from happening, and, if possible, to investigate the fundamental source of the edifice system technology. The coalition government retains a relatively moderate attitude towards the edifice system, and although the system is related to prehistoric civilizations, in the eyes of most senior officials, it is something that humanity has taken away from prehistoric civilizations, and they generally believe that what prehistoric civilizations are doing now is to regain control of the edifice system.

The Nanqiyun group was also included in the members of the operation.