Episode 28 recap: Ye Wenjie revealed the cause of Yang Dong's death.

Chang Weisi also asked Ye Wenjie the last important question. So far, has the Trisolaran civilization only been sending electromagnetic waves to Earth? Ye Wenjie did not directly deny this viewpoint in her response. In her view, the current generation of Trisolaran civilization has achieved a speed of one-tenth the speed of light for interstellar travel. This technological leap occurred several decades ago, and prior to that, their spacecraft speed had been hovering at a few thousandths of the speed of light.

The small probes they launched towards Earth have not yet reached the Centauri system, representing only 1% of the distance between the Solar System and that system. The Trisolaran interstellar fleet, composed of large spaceships, has a massive mass and accelerates very slowly, reaching a maximum speed of one-tenth the speed of light. At this speed, they can only cruise for a short period before starting to decelerate. The time it takes for the Trisolaran fleet to reach the Solar System is ten times that of the small probes. The propulsion of Trisolaran spacecraft relies on the annihilation of matter and antimatter.

In Ye Wenjie's memory, six years ago, in the distant Alpha Centauri system of the Trisolaran world, they had accelerated two hydrogen nuclei (protons) to near the speed of light and launched them towards the Solar System. These two hydrogen nuclei arrived in the Solar System two years ago and then reached Earth. This was the only capability the Trisolaran world possessed to accelerate objects of this size to near the speed of light.

Ye Wenjie did not reveal the truth to her daughter, Yang Dong, earlier because she believed that everything she knew was not necessarily the complete truth. After Chang Weisi finished interrogating Ye Wenjie, Wang Miao also met with him and thanked Ye Wenjie for being willing to see him.

Ye Wenjie also told Wang Miao about Yang Dong's collapse of faith. She could clearly sense that without physics, her daughter would not be able to continue living. She made a choice and made an effort to live like an ordinary woman. For her daughter, half of her life had already been destroyed.

And the other half that was destroyed was Ye Wenjie herself. She accidentally discovered the undeleted files on her computer and learned the secrets of the Trisolarans. Her daughter would never have imagined that her mother, whom she relied on for everything, was actually someone else, and even the kind of person her daughter had never believed could exist. These two things combined constituted the entirety of Yang Dong's life.

Wang Miao understood that physics had never existed, and in his understanding, he also knew that physics would never exist in the future. In Wang Miao's subsequent experiences, he also encountered Ding Yi, Yang Dong's husband, and they discussed the perplexing circumstances surrounding Yang Dong's cause of death.

At this moment, Wang Miao felt quite the opposite. After reading Yang Dong's farewell letter, he firmly believed that the letter had become even more strange. Wang Miao was at home, reading stories to his daughter when Shi Qiang came to the door looking for him and took him to a place. They went to the headquarters, where Chang Weisi and personnel from the Global Defense Center talked about the war between humanity and the alien invaders. The alarm bells had already started ringing, and in Wang Miao's view, everyone was facing such a alarming enemy for the first time.

After the situation was resolved, Wang Miao and Shi Qiang stayed together. Shi Qiang joked with Wang Miao, asking him to play a game with all of humanity. After listening to Shi Qiang's grand speech, Wang Miao chuckled because, in his impression, ever since he first met Shi Qiang, he sensed something extraordinary about him.

In Shi Qiang's view, Wang Miao might just be a good weapon for killing. Wang Miao smiled and didn't say anything further. Soon, Chang Weisi continued to hold a meeting at the Global Defense Center, and Shi Qiang quickly joined in. He even debated with foreign colonels. In his opinion, if you throw a bunch of bombs on a ship and blow it to pieces, that's still a military action. However, if you can retrieve things intact from inside the ship, don't be fooled by the stars on a soldier's shoulder; they are still not as skilled as sneaky thieves.

Wang Miao believed that with the existing nanomaterials, according to this plan, the minimum distance between the two threads would need to be 50 centimeters. After hearing this, Shi Qiang also understood. The ship would need to pass through the canal during the day. Then he proceeded to analyze his own conclusions to the others.