Traveling Through the Apocalypse: the Golden Finger Does Not Give Instructions at the Beginning

Luo Chen inexplicably traveled to the apocalyptic world, and before he could figure out the situation, he jumped into the street. When he woke up again, he appeared in a mysterious space, where he experienced unimaginable torture - personally experiencing the death of countless people. Where will he go in the end? Why does the owner of space call him the remnant of civilization? How can the legacy of civilization enable him to survive in the new world?