Timelapse: 10-story building goes up in nearly one day June 21, 2021October 4, 2022 Using a pre-fab, modular design, BROAD Group was able to construct a 10-story apartment building in 28 hours and 45 minutes in Changsha, China. https://www.cnn.com/videos/business/2021/06/16/10-story-building-constructed-in-one-day-orig.cnn-business/video/playlists/business-originals-counterprogramming/