How Did I Not Know That I Was the Most Dangerous Person in the Universe?

[Travel through time and space, suspenseful, brain-burning, complete world view, with CP] In 2028, the end of the world, young Jiang He volunteered to become an experimental subject and jumped into an endless energy engine called "Golden Chi". When he woke up, his surroundings were unrecognizable - he accidentally arrived in 4178. Just when he was planning to live in this era, an unknown killer came to the door with a weapon. "You are the most dangerous man in the world," he said, pulling the trigger. So Jiang He died. In 4178, no one remembers who the first experimenter who jumped into the engine was, and no books and materials recorded Jiang He's name. As an experimental subject, Jiang He suffered a tragic betrayal and disappeared from the long history, replaced by an unidentified wanted criminal. The world had failed him - after realizing this, anger, unwillingness, grievance, and countless complex and twisted emotions squeezed and boiled crazily in Jiang He's chest. A terrible silence. After a long time, he silently walked towards the black-haired girl standing aside and extended his right hand in an inviting manner. "Want to do something big? - We're going to shake up the universe." … Wait? It's really strange. Isn't "Jiang He" dead? (Updated from 12:00 to 18:00 every day)