How long does it take to build a skyscraper? In China, it only takes DAYS. This 57-story 2-million-square-foot skyscraper was completed in a mere 19 days. It is built with energy-efficient, factory-produced Lego-like blocks.

There are over 800 apartments, and office space for 4,000 people.

The use of the modules reduced the need to use concrete by 15,000 trucks.

Pretty amazing nonetheless.