Establish a low-Earth orbit defense system to prevent sophons from expanding in low dimensions

Build a space elevator to transport people and materials to low-Earth orbit, gradually develop orbital space, and use this as a stepping stone to explore the solar system.

Various countries formed space forces and formed a combined fleet to resist the Trisolaran invasion during the Doomsday War. The latter fleet became independent of the countries where it originated and became an independent political system, consisting of the Asian Fleet, the European Fleet, and the North American Fleet.

Master controllable nuclear fusion and use it as a source of energy to develop industries and warships. And began to explore the construction of ecological circulation system to realize the needs of stellar navigation

After the breakthrough of controllable nuclear fusion that Ding Yi participated in, the driving method of the battleship arose between working medium propulsion and working medium-free radiation drive. The old aerospace industry with the right to speak supported the working medium propulsion plan, and the new forces in the space force and aerospace industry supported it. radiation drive

Zhang Beihai used meteorite bullets to murder the old aerospace officer and disguised it as a space accident. The working medium-free radiation drive scheme passed

After the Great Depression, human technology has advanced by leaps and bounds. All relevant plans are realized and a solar system fleet base is established on Jupiter.

doomsday battle

In front of Yang Dong's grave, he was inspired by Ye Wenjie, who guided him to study the sociology of the universe and told him the basic theorem of the "dark forest" theory.

After entering the Age of Crisis, he was hunted by ETO and was selected to become a Wallfacer.

He used the special powers of the wall-facer for his own enjoyment, and asked Da Shi to help him find his dream lover Zhuang Yan.

After communicating with Taylor, he learned that Taylor committed suicide and Zhuang Yan disappeared with his children, forcing him to start executing his plan to face the wall.

Discovered the "Law of the Dark Forest" on the ice

In order to confirm the law of the dark forest, he used solar gain reflection to send a "spell" (i.e., the mutual position coordinate information of the star and thirty surrounding stars) to the star 187J3X1 outside the solar system, "cursing" (predicting) the star to be destroyed, and countries The representative regarded him as a wizard talking nonsense, but he was assassinated again by ETO-a genetic missile attack. When he was seriously ill and dying, he hibernated and went to the future to wait for treatment.

After waking up from hibernation, he was released from his identity as a wall-facer. However, he was assassinated multiple times a day because of the programs left by ETO. He saved his life with the help of Shi Qiang. After the Doomsday Battle, people discovered that the 187J3X1 star was destroyed, and the Wall-Facing Plan was restarted. Luo Ji became the Wall-Facing Man again, and explained the Wall-Facing Plan to Shi Qiang in the desert.

Since the water droplets blocked the sun, Luo Ji could no longer send messages through the sun. In order to see his wife and daughter, Luo Ji devoted himself to the snow project to try to warn the Trisolaran fleet and the water droplet detectors from arriving in the solar system. People were disappointed that Luo Ji could not save the world and expelled Luo Ji from the community

In the process of carrying out the snow project, Luo Ji began to implement his own wall-facing plan. He used the snow project to spread oil film materials around the sun to arrange the solar nuclear bomb chain into the coordinates of the Trisolaris system, and triggered it through the "cradle system". Once Luo Ji dies, he will broadcast the coordinates of the Trisolaran world to the universe to establish a dark forest deterrent.

subtopic

The former Secretary of Defense of the United States, on the surface, hopes to establish a space force with macronuclear fusion weapons and ball lightning as the main combat weapons. The actual intention is to use macronuclear fusion weapons and ball lightning to attack the main force of the earth in the "Doomsday War" Fleet, allowing the Space Force to operate as a "quantum ghost". To this end, he visited various countries looking for death squads, but to no avail.

Because his actual intentions were discovered by the Wallbreaker and he was unable to remove his identity as the Wallfacer, his mentality exploded. He committed suicide after talking to Luo Ji.

The President of Venezuela, on the surface, intends to use a stellar inventory to attack the Trisolarans, but his actual intention is to use a stellar hydrogen bomb to cause Mercury to fall into the sun, causing the sun to explode and engulf the entire solar system, thus threatening the Trisolarans.

After the actual intention was discovered by the Wallbreaker, it was pointed out that human power cannot destroy the solar system. After intimidating the PDC through the cradle system and returning safely to his own country, he was stoned to death by angry citizens.

The superficial intention of brain scientists is to use technology to speed up brain evolution and enhance human intelligence. They hope that humans in the future can break through the sophon blockade and develop ideological stamps that can strengthen humans' belief in victory. The real intention is to study ideological stamps and implant the concept of absolute defeatism into mankind, so that mankind can escape from the solar system as soon as possible to avoid direct contact with the Trisolaris.

His wife Keiko Yamasugi broke the wall and announced the idea of ​​​​implanting failed ideas into the Seal clan through the change of positive and negative signs. In order to deal with the possible defection of the Seal clan, Fleet International awakened Zhang Beihai, a group of soldiers before the invention of the Ideological Seal. The executive captain indirectly helped Zhang Beihai escape.