Water Moon Cage Sand

He is a volunteer who participated in the salvation plan, numbered 7534. He keeps sitting in the time machine to return to every era and every self; with memories that do not belong to that era and technology that does not belong to that era, he is far away from his relatives and hometown, making preparations to save the future, but Unfortunately, every preparation only delayed the destruction a little. Finally, three minutes before the destruction of mankind, he, as the only survivor of the plan, took the activated memory and technical data, got into the time machine for the last time, and returned to 1840; when he woke up, he found that he was actually a eunuch...