The 1St Book for Sociophobes

Dream! Without knowing the beginning or the end, why can some people live their entire lives in a dream after only sleeping for a few hours? The protagonist Zhang Yifan has a strange dream every night. In the dream, he evolved from a cell into a maggot, led the orcs to regain freedom, became a chef, and visited India and ancient Babylon. What is the meaning of these dreams?