Currently, the tallest building in the world is Dubai’s 828-meter Burj Khalifa, but that probably won’t be for much longer. China has already started construction on its 838-meter building called Sky City in Changsha located in central China. The Changsha-based construction company called the Broad Group claims that the building will be completed by April 2014, a build time of ten months. The Burj took five years. Broad Group’s secret to ultra-fast construction appears to be the use of pre-fabricated steel and concrete blocks which are assembled off-site and then transported to the location where they can be quickly implemented (rather than actually building on location) in a method similar to pre-fab homes. Once the external construction is completed, internal adjustments can be made in under six months. While there has been a fair amount of skepticism, the feasibility of the new “fast-build technology” will be clear if the Broad Group can reach its proposed goal.