I Wake up Outside of Time

When he woke up, Shen Guixu lost all his memory. In front of him, there was only one door. Pushing open the door, he entered an era dominated by steam and machinery. When he returned again, there was another civilization behind the door. Ancient gods, mechanical empire, extraordinary dynasty, doomsday wasteland... Shen Guixu originally thought that what he gained was the ability to travel between worlds. Until he saw the statue he had left behind in an era that had been destroyed. Only then did he realize. The so-called realms are just the same land spanning hundreds of millions of years. And every time he opens the door, he is personally changing the history of this world. There's just one problem - Why do people of all ages seem to have seen