When I traveled to the primitive times, in an era with no openness at all, all I had to do was to protect myself. However, there were always some unexpected gains at the beginning of everything, which led to too many emotions. This may be the butterfly effect.
Ah, I don't know what I am writing. The author is very useless, CP writing.
Intention: Human nature is not willful, as long as you are willing, everything will be beautiful.