There are many things which we can learn from other countries around the world. Take a look at this building in China, for example. Harnessing manpower like never before, Chinese sustainable building company Broad Group has accomplished the seemingly impossible task of constructing a 30-story hotel in a mere 15 days (360 hours)! The above time-lapse video perfectly illustrates the whirlwind construction that highlights the never-ending possibilities of prefab architecture.