This is not about traveling back in time, just taking a look at the things you wanted to experience in the original world or the things you regretted.
A person who can freely travel through parallel spaces in his dreams
I met my younger brother who died just when the family planning policy was implemented.
I saw myself running down the road with my head down and being hit on the head by a battery car that was driving very fast and died.
I saw an inexplicable person who asked me to drink water in an alley on my way home.
There was also the appearance of the person who reached out to me when I fell down in the square where I first learned to roller skate, but he didn't reach out to me in that space.