Outliers noticed that a construction firm has announced plans to build the world's tallest building in Changsha, China, in only 90 days' time, using new techniques.

If approved by the Chinese government, the 220-story building called Sky City would include a hospital among its many amenities. Perhaps some U.S. healthcare provider could vie to provide staffing and let us know what the view is like from up that high—just over half a mile high, in fact.

The building would also include schools, 17 helipads and apartments for 30,000 people, according to the renowned architecture and design blog Dezeen.

At about 2,750 feet tall, Sky City would be approximately twice as tall as Chicago's Willis Tower, which when it was opened as the Sears Tower in 1974 was then the tallest in the world, but now ranks a paltry No. 8, according to the Council on Tall Buildings and Urban Habitat.

If everything goes as planned, Sky City would eclipse Dubai's Burj Khalifa—currently the world's tallest building—in height by March of next year, rising at the breakneck pace of five stories a day.

How could a building go up so fast? Officials with China's Broad Group engineering firm say they've devised a construction technique in which modular pieces of the building are constructed in a factory off-site and then shipped to the location for quick assembly. The firm told Dezeen they've already proven the concept by building a 30-story tower in 15 days with the same technique.

To recap: tallest building ever, experimental method, 90-day construction period, 30,000 residents and a hospital. What could go wrong?