Episode 20 recap: Shen Yu Fei was killed and passed away.

From that moment on, Lin Wei Cheng had been studying the Three-Body Problem. Wang Miao couldn't believe it because the Poincaré recurrence theorem stated that the three-body problem had no analytical solution in mathematics. However, Lin Wei Cheng didn't believe what Wang Miao said either. He held a glimmer of hope for this problem and later heard about evolutionary algorithms, though he only learned about the term much later.

However, the computational complexity of this problem was immense, far beyond what current computers could handle. Moreover, Lin Wei Cheng didn't even have access to a computer at the time, so he had to calculate everything by hand. He didn't know how long he had been calculating; days just passed by.

One day, Shen Yu Fei barged into Lin Wei Cheng's room and accurately recognized that his entire calculation process was related to the Three-Body Problem. Shen Yu Fei, like Lin Wei Cheng, was obsessed with the Three-Body Problem. She even invited him to leave the mountain and live in a better mathematical environment.

After Shen Yu Fei left, Lin Wei Cheng couldn't sleep. When he went out, he encountered Shen Yu Fei again. From then on, he followed Shen Yu Fei down the mountain and began living the life he had always dreamed of. Shen Yu Fei fulfilled her promise and provided him with a small computer and a comfortable living environment. She also occasionally used supercomputers abroad.

Shen Yu Fei was very wealthy, and she created many computational environments for Lin Wei Cheng. The two of them reluctantly stayed together, but after they got married, they led separate lives. Lin Wei Cheng relied on Shen Yu Fei for his daily necessities while he continued his research on computations. She didn't interfere with his life, and their only communication was discussing the Three-Body Problem.

After Lin Wei Cheng finished telling the story of Shen Yu Fei to Shi Qiang and Wang Miao, he also shared the information about Pan Han threatening him. Before that, Pan Han had approached him, explicitly demanding that he stop his calculations. Otherwise, Pan Han would kill someone. What frightened Lin Wei Cheng even more was waking up in the middle of the night feeling cold and finding his wife, Shen Yu Fei, holding a knife to his throat, threatening him not to stop calculating the Three-Body Problem.

Afterward, Lin Wei Cheng handed all the models and shared documents to Wang Miao, asking him to safeguard them because he now trusted Wang Miao as a good person. When Wang Miao returned, he re-entered the Three-Body Game. In the game, as Copernicus, he soon encountered Einstein. As the sun rose, it emitted a silver-white light, but there was no sense of warmth. The sky quickly tore apart, causing Einstein great pain. His emotions became abnormal because, in his understanding, the tearing apart signified a despairing destruction, wiping out all the efforts made by humanity.

Einstein felt that the people around him had been abandoned by God. He hoped that God wouldn't abandon everything. He believed that Copernicus, Newton, and the others who used human column calculations in the East were already very close to the truth. However, they were still missing that tiny bit. For Newton and the others, it was an insurmountable gap. Copernicus believed that Einstein's theory of relativity perfectly bridged that tiny gap. However, Einstein vehemently denied it. He knew that even without him, someone would discover the theory of special relativity. But it wasn't the same for general relativity. Newton's slight deficiency lay in the gravitational perturbation of planet orbits described by general relativity. It was because of this tiny gap that significant flaws appeared in the calculations. Einstein understood that by adding the correction of gravitational perturbation to the classical equations, one could obtain the correct mathematical model, and its calculations would be much larger than those completed in the East.

While the two were in conversation, Shen Yu Fei quickly found Copernicus, who also handed over Lin Wei Cheng's models of the Three-Body Problem. The pendulum initiation ceremony was about to begin, and they continued to move forward. Copernicus had also seen a pendulum during the Warring States period, and Shen Yu Fei believed that the initiation of the pendulum signified the end of all past efforts, which was their final hope and meant that everyone around them could successfully escape from suffering.

As they walked on, they quickly arrived at the demonstration that the Three-Body Problem had no solution, and it was unpredictable. The current civilization had reached a considerable height, and with the development of civilization, it reached another level. Although they couldn't understand the rules, at least they could still survive in this chaotic era. The pendulum initiation soon officially began, and Copernicus was ready to embrace this historic moment. Looking at the awe-inspiring scene before him, he marveled at the insignificance of humanity. Shen Yu Fei, by his side, added that life was fragile and vulnerable in the universe. Copernicus also believed it was magnificent. That's why the seed of civilization 192 would sprout unintentionally, allowing people to see the resilience of life.

Shen Yu Fei looked at everything before her, and she quickly thought of Yang Dong, who had a tragic fate. In her view, Yang Dong should have lived out his life without knowing what she had experienced. After 451 years, Civilization 192 was destroyed in the flames that rose against the twin suns. It evolved into the era of atomic nucleus information, and Civilization 192 was the milestone of the Trisolaran civilization. It ultimately proved the unsolvability of the Three-Body Problem, abandoning the futile efforts of Civilization 191, and determining a completely new direction for future civilizations. The ultimate goal of the Three-Body Game was to find a new home.

Afterward, Shen Yu Fei quickly returned to real life. She looked at the results before her with pain and unease. Pan Han soon came to visit her, and he always thought her ideas were childish. After explaining everything, he immediately held a gun to Shen Yu Fei's head. Time quickly passed, and on the other side, Wang Miao received a phone call with the news of Shen Yu Fei's death, while Xu Bing Bing discovered through surveillance investigation that the biologist Pan Han had been entering and leaving her house.