This story is based on the Happy Building and describes different stories on each floor. The characters will be interspersed, and there is a cycle of reincarnation in every 8 chapters, so the first chapter will be next to Chapter 9. If you are not interested in some characters' stories, you can jump and read the story more complicated. There are training, black people, ghosts, cuckolds, pure love, please choose to eat it yourself. The update will be released first based on the part that the book friends are interested in. If no one leaves a message, the story will be based on this model. The Happiness Building will be updated as soon as January 1st, with convenient transportation, beautiful environment, affordable buildings with 13 floors, 1-3rd floors are commercial, 4-10th floors are residential buildings, with more than 100 shops in commercial buildings, and 4 households on each floor of residential buildings.