Sky City (Changsha)

Sky City (Chinese: 天空城市; pinyin: tiānkōng chéngshì), or Sky City One, was an 838-metre-tall (2,749 ft) planned skyscraper in the city of Changsha, Hunan in south-central China. The prospective builders, Broad Sustainable Building, estimated it would take just 90 days to construct. Including the 120 days were needed for prefabrication before on-site work commenced, the sum of time needed was 210 days. Pre-construction activities were halted in August 2013 after government regulators required additional approvals.

Broad Sustainable Building had intended to build a 666-metre (2,185 ft) skyscraper, but the local government wanted the world's tallest building, hence the current plans. The company has constructed 20 buildings in China using the same method and has several franchise partners globally. It has a planned helipad at a height of 739.8 m (2,427 ft) above ground.

As of May 2016, plans for the building's construction are stalled, and the foundations for the planned building are being used as a fish farm.

On 8 June 2016, it was reported by the People's Daily that the project had been dropped due to protests over environmental damage to the Daze Lake wetland. The People's Daily said, "Central China's Hunan province finally announced a halt on its ambitious plan to build the world's tallest tower within one part of its rare wetland area. The Daze Lake wetland is the location where the world's next tallest tower was originally scheduled to be built. This wetland is now listed as one of the 20 waters to be permanently protected and will follow non-construction zone policies. It is a pristine wetland hailed as the last wetland in Changsha where many rare bird species take habitat. Shelter of these birds would be largely disrupted by the building of this tower." However Broad Group declared: "We will definitely build the tower" in 2016.