The ending of the novel How Far Is One Light-Year's Distance was like this: At the end of the story, one of the protagonists, Astronomist Xiao Zhang, successfully used a supercomputer to simulate the event horizon of a black hole and achieved great success through this experiment. However, because his experiment involved national security issues, Xiao Zhang was forced to escape from the laboratory. During his escape from the laboratory, Xiao Zhang met a mysterious girl. She told him that the simulation of the black hole event horizon was one of the important goals of the national security agency. They had been quietly studying this topic and trying to achieve national security through this experiment. The girl also told Xiao Zhang that the National Security Agency was trying to grasp the true laws of the universe through the simulation of the black hole event horizon in order to grasp the control of the universe. Xiao Zhang was shocked and terrified. He realized that his scientific research might have attracted the attention of the country and was at risk of being used. In the end, Xiao Zhang and the girl escaped to the edge of the universe. They saw the spectacular scene of the universe and realized that they would never be able to return to Earth because their location was too far away from Earth. The novel How Far Is One Light-Year Through the story of a scientist, it revealed the potential threat of national security agencies in scientific research and reminded people to be cautious when conducting scientific research to avoid being used by the state.