China: Highly efficient 30-story hotel built in 15 days using pre-fab

A colleague sent this to me just now. BROAD Sustainable Building Co., LTD accomplished a fascinating feat through pre-fabrication of erecting an entire 30-story hotel in just 15 days. The project is located in the Hunan province of Southern China and was designed/engineered to be incredibly energy efficient, with less than 1% construction waste, as well as promoting indoor air quality much cleaner than the outside air. A time-lapse video is below: