China Just Built a Factory That Makes Buildings Like Lego — And It Takes Hours

China is building skyscrapers at a speed that almost seems impossible. In Changsha, Broad Group built a 10-story apartment building in just 28 hours and 45 minutes. Before that, the company assembled the 57-story Mini Sky City in only 19 working days. But these buildings aren’t constructed the traditional way — they’re manufactured inside a factory and assembled on-site like giant building blocks. In this video, we explore how China’s modular construction technology is changing the way buildings are made, how Broad Group and its Holon building system work, and the engineering behind the company’s innovative B-core steel technology. We’ll break down how plumbing, wiring, walls, floors, windows, and interior finishes can be installed before a building ever reaches the construction site — allowing up to 90–95% of the work to happen inside a factory. But building a skyscraper in days instead of years comes with serious challenges. We also look at the limitations of prefab construction, transportation problems, building regulations, massive factory costs, design restrictions, and the structural failure that nearly derailed Broad Group’s ambitions. Could this technology help solve the global housing shortage? And could the future of construction look more like a car factory than a traditional construction site? Watch until the end to see how prefabricated buildings, modular construction, Chinese engineering, and factory-built skyscrapers could completely change the future of architecture and urban development. If you enjoy videos about engineering, megaprojects, construction technology, China, architecture, manufacturing, and futuristic infrastructure, subscribe for more. Would you live in a 10-story building that was assembled in less than 29 hours? Let me know in the comments. #china #construction #engineering #megaprojects #modularconstruction #prefabconstruction #skyscraper #architecture #BroadGroup #constructiontechnology