According to its engineers, this will be the tallest skyscraper in the world by the end of march 2013. Its name is sky city, and it's 2,749 feet (838 meters) distributed in 220 floors will grow in just 90days in Changsha city, by the Xiangjiang river. Ninety days!!!

Its not a joke, according to the construction company, the skyscraper wil be built in just 90 days at the unbelievable rate of five floors per day.

It's hard to believe, but they claim the building has been designed by some of the engineers who previously worked at the Burj Khalifa. It is also the same firm that built a full 30-storey hotel in 15 days which is still standing in perfect working condition.

Read more at: m.gizmodo.com/5962070/china-will-build-the-tallest-building-in-the-world-in-just-90-days