A Chinese company plans to build the world’s tallest building in just 3-months. That’s right, Sky City will stand 838-meters tall (Burj Khalifa is 828m) once it is completed in January 2013, thanks to pre-fabrication methods. Construction will begin in November when many of the pre-fabricated sections are ready. Continue reading for a video showing how they built a 30-story building in just 15-days and more information on Sky City.

Despite its gargantuan size, the building will supposedly use one-fifth the energy of a traditional edifice, because its 6-inch-thick walls and quadruple-glaze windows will provide better insulation. When it’s complete, 104 elevators will connect 220 floors and 1 million square meters (10.7 million square feet) of usable space. This will include the world’s tallest hotel, living space and potential office space.

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