The humans on Earth with the technology of the future had already mastered the ability to travel through time and explore space. The protagonist of the story was a young scientist who invented a new time machine that could travel to a certain moment in the past or future. By using this machine, he could meet with historical figures and help them solve some problems. In this future Earth, humans will face many challenges, including environmental destruction, resource scarcity, and global war. The protagonist and his friends began to explore the planet and try to find a solution to these problems. They cooperated with other humans to solve a series of problems and gradually established a more peaceful and harmonious world. This novel had profound philosophical thinking and explored the fate of mankind and the direction of future development. At the same time, there are many thrilling plots and exciting battle scenes that give you a strong sci-fi atmosphere.