As time passed, humans finally discovered the existence of extraterrestrial intelligent life. They sent an invitation to the civilization on this planet, hoping to establish contact and communication with them. However, the civilization on this planet was full of hostility and distrust towards the Earthlings. After receiving the invitation from the humans, they immediately launched an attack on Earth. Earth was caught in a fierce war, and mankind was facing unprecedented crises and challenges. In this war, there was a young warrior named Jack who performed well. He bravely stood on the side of the human race and fought to protect himself and his homeland. During the war, Jack accidentally discovered a mysterious system that could help humans predict and avoid enemy attacks. Jack began to use this system. He found that he could predict the direction of their attacks by controlling the enemy's behavior. He was getting more and more familiar with the system and could even predict the enemy's weaknesses and loopholes. In the end, humans successfully resisted the enemy's attack and Jack became a human hero. After the war, Jack decided to leave Earth and head to the mysterious planet to continue his exploration and research. He found that the civilization on that planet had many similarities with the civilization on Earth. They were also seeking knowledge and exploring the unknown. Jack established contact with the civilization on that planet. They explored and studied many things together and established friendly relations. In the end, Jack became an important figure on that planet. He helped that civilization establish a new era of prosperity and progress. The world's shortest sci-fi novel continued with a hero's journey as the theme, telling the story of humans bravely facing challenges in war and the enemy achieving peace and progress through technology and exploration.