In " The Three-Body Problem," Luo Ji was a Chinese scientist and also one of the wall watchers. His main activities in the novel include: 1. [Discovering the Law of the Dark Forest: At the beginning of the novel, Luo Ji discovered the Law of the Dark Forest in the universe through his own research and thinking.] This discovery played a crucial role in the development of the entire story. 2. [Becoming a Wallfacer: In order to fight against the Three-Body Civilization, the United Nations selected four Wallfacers, and Luo Ji was one of them.] As a wall-facer, he could make any plan without any explanation, because no one could see through his thoughts. 3. [Establishing a deterrence system: After becoming a Wallfacer, Luo Ji established a deterrence system through his own efforts.] This system made use of the mutual deterrence between the Three-Body Civilization and the Earth Civilization to ensure peace between the two civilizations. 4. [Losing deterrence: In the second half of the novel, Luo Ji loses control of the deterrence system due to personal reasons, and the Three-Body Civilization begins to attack Earth.] 5. [Re-establish deterrence: When the Earth civilization was facing a desperate situation, Luo Ji re-established the deterrence system and stopped the Three-Body Civilization's attack.] All in all, Luo Ji was an important character in " The Three-Body Problem." His discoveries and actions played a crucial role in the development of the entire story. While waiting for the anime, you can also click on the link below to read the classic original work of " Full-time Expert "!