Introduction to Baiyun Palace: According to legend, it is the place where the Seven Fairies descended to earth. In "The Fairy Match", the Seven Fairies have a line, "My family originally lives in Penglai Village." Penglai Village, where the Seven Fairies live, is of course the Immortal Palace in the Sky, so once you leave the Baiyun Palace, you have returned to the mortal world.