In fact, this is an experience I had in college. The so-called Rainbow Nation is just a club I participated in. The basic structure of this story is the process of establishing the club. Based on this experience, I made up a fictional era, using this non-existent dynasty as a cover, to write about my past joys and past worries, in order to commemorate this deeply loved society, all the friends in the society, and a love that accompanied the society and followed the society.