Time Travel Book

Zhang Changde, the most miserable time traveler in history, traveled to a parallel world After experiencing the glory of his childhood, he began to be rejected by the world. Just when he couldn't bear it and wanted to end his life, a man who claimed to be the Space-Time Administration appeared. After revealing Zhang Changde's identity as a time traveler, he was asked to travel once and only need to survive in that world for 3 years before he could become a member of the Time and Space Administration and no longer be ostracized by the world. After Zhang Changde took over the task, he slowly discovered that things were not as simple as he thought...