Eventually, Yuyun joined the new study of the Civilian Soldiers. It wasn't because of Yuyun's impulsiveness, but Wen Bing's complete and scientific analysis of this fanciful thing.

Wen Bing is not a physicist, although with his wisdom, he can learn the relevant knowledge in a few years. But this study of time backtracking is not a physical time jump. As a medical doctor, Wen Bing holds two views. First, if the human brain can be fully stimulated, it will have great potential. This potential enables great computing power, and is emotional and subjective in a way that cannot be achieved by computers. Second, consciousness is a type of information that is transmitted through electrical signals. The same brain structure has the potential to produce the same consciousness, both now and in the future. Therefore, in the early days of the study of the Civilian's time regression, he hypothesized that if the current brain was to stimulate its potential and remain in a highly active state, it would be possible to fully calculate what would happen in the future and appear in the form of memories as if it had actually happened. And when countless kinds of futures seem to have been experienced, and the experimenter firmly believes that this is what he has experienced, this is essentially a kind of immortality at the level of consciousness, and he can "experience" different lives over and over again.

Yuyun is not a professor of medicine, so he can't help much in the research of this potion that stimulates the activity of the human brain. But as a research professor on artificial intelligence, Wen Bing really needs his help to think clearly about a philosophical question. What is the human soul, or consciousness, or the only substance that proves that each person is himself? Is it true that the soul of a person who can go back in time has gained eternal life?

After that, Yuyun resumed his main business of artificial intelligence research, and sometimes thought about how to advance the research of brain-computer interfaces, and assisted the civil soldiers in the time retrospective research of the civil soldiers in the best way he could.

One day at the end of 2013, Wen Bing approached Yuyun and said that his research had made a historic breakthrough. He believes that people are never in a state of complete memory of what happened in the past. For the same thing, the details that everyone remembers are different, and this is because everyone's brain circuits are different, resulting in different people's concerns. Therefore, the prediction of the future should not be the whole picture, but should be the first perspective, because the memory of the same thing is completely different for everyone. This also shows that this must happen, so that it is possible to send a signal to the past self with one's own memories of first-person subjectivity. Before this happened, the human brain couldn't do global calculations.

Based on the above research conclusions, future research has two major goals, the first is to successfully prepare potions that can make the brain extremely active and even accept future signals, and the second is to find a way to transmit signals to the past self.

At the same time, based on the above conclusions, Wenbing planned everything for the future as early as 2013. After the research of the potion is successful, it is first necessary to find a high-IQ experimenter with a close relative, kidnap his close relative, and make him drink the potion, which has the ability to rewind time, and threaten the experimenter to cooperate with the civilian soldiers to complete a large number of human experiments. Part of the experiments were to verify the rejection of different diseases and the potion, and the other part was to test the theory of sound time regression and the theory of the nature of the soul, including the human centipede experiment.

At that time, Yuyun felt unbelievable and unacceptable. When asked why he did these experiments and why he didn't drink the potion himself to do the experiments, Wen Bing explained like this. He had lived a busy life for only one reason, and that was because he wanted eternal life. What is for the development of human beings, in order to break the constraints of lifespan on human civilization, is just to inspire the words of other people in their laboratory, and Brother Shui, who later entered the laboratory, naturally received the baptism of this kind of words. Therefore, until the safety of the potion is fully verified, it is absolutely impossible for him to be the first person to drink the potion. Of course, there is another reason that Wen Bing does not want to do some human experiments.

There are many reasons why it is necessary to test the tolerance of potions in patients with various types of diseases. The civil soldiers have been working tirelessly for 20 years, and they are no longer the same person they were back then, and some minor problems have gradually appeared in their bodies. Therefore, it is particularly important to conduct tolerance tests on some minor diseases to ensure the safety of the potion taken by Wen Bing. And for some diseases that you don't have at all, you should also do tolerance experiments, the reason is very simple. One is that if you don't have a disease now, it doesn't mean you won't have it in the future. If you suffer from some new diseases in the future, you don't go back to your youth as soon as possible, and want to continue to feel this life, and you can't accept it if you drink a potion and die directly. The second is to conduct potion tolerance experiments on patients with various types of diseases, which can confuse him and threaten the experimenter who assisted in the experiment, that is, the future water brother. To prevent the experimenter from guessing that these diseases happened to be suffered from by the soldiers, and deliberately providing false conclusions to murder the soldiers.

After the experimenter has completed all the tolerance and confirmatory experiments, and the results are informed of the backtracking time, Wen Bing can safely drink the potion and release the experimenter's close relatives. Since the Civilian Soldier has a time regression point before the experimenter's close relatives are released, the first experimenter in the world to drink the potion cannot pose a threat to the Civilian Soldier.

As for all kinds of confirmatory experiments, including human centipede experiments, Yuyun didn't bother to listen to Wen Bing explain the principle anymore. Yuyun believes that it is unacceptable to use other people's hands to complete the experiments, or the human experiments themselves. The ability to go back in time does not mean that you have the power to be rewinded over the law and humanity.

At this point, Yuyun completely broke with the civil soldiers and parted ways.

Although in Yu Yun's view, Wen Bing's idea of time regression violates the law of cause and effect, he knows that Wen Bing is a person with superior wisdom, and if he can put forward such an idea, it must be scientific. Therefore, Yuyun was very afraid that one day Wen Bing would really succeed and carry out his human experiments. If a civilian soldier has a weapon of time ability, then all his other weapons cannot compete with it.

Wen Bing next studied two big goals, and the second was that he couldn't think of a way to achieve them. But for one, it would take many years to create a potion that would make the human brain extremely active and radiating. But to create an artificial intelligence that always keeps the mind extremely active and divergent, that is, the hardware circuit system has always maintained a very high utilization rate, it can be achieved with a few lines of strong settings.

In the next three years, Yuyun exhausted his life's research results and developed a set of artificial intelligence algorithms that perfectly passed the Turing test after deep machine learning. Human emotions, ways of thinking, language skills, and even the weaknesses of human nature have all been learned vividly by this algorithm, and they are no different from real people. However, he is out of touch with Wen Bing's experiments, and he has no way of knowing what the specific method of going back time is, and whether artificial intelligence can achieve similar effects to the human brain.

With the slim hope that AI will be able to figure out how to go back in time, or have an epiphany after experiencing some opportunities, Yuyun decided to make this algorithm as completely human as possible, so that this AI algorithm can have the full function of the human brain.

However, this algorithm cannot be implanted in a set of tin machines that resemble human bones. First, the operation mode of the iron machine is different from that of the human body, and if in the future, human beings realize the technology of time rewinding, the artificial intelligence of the operation mode of the iron machine may not be realized. Second, we must not let the civil soldiers discover their last hole card, and it is best to let the artificial intelligence itself not know that it is not human, so as to avoid the future civil soldiers from using the ability to go back in time, and before this set of artificial intelligence explores the ability to go back in time, kill this hole card of Yuyun.

Eventually, Yuyun finds his best friend, the alkane's father, and explains his intentions. Due to the great benefits of the thinking growth of the alkanes themselves, after a long ideological struggle, the father of the alkanes promised to allow Yuyun to implant the algorithm of the alkanes under the premise of ensuring absolute safety.