Broad Sustainable Building (BSB), a construction company based in Hunan, is planning to erect an 838-meter building called Sky City (天空城市) later this year in Changsha, the provincial capital of Hunan Province.
Projected cost for the building is RMB 4 billion (US$628 million).
Once completed, the 220-story structure will surpass Burj Khalifa to become the tallest structure in the world.
BSB is renowned for its eye-opening construction efficiency. Its portfolio includes assembling a 15-story building in six days in June 2010, and erecting a 30-story hotel in 360 hours in December 2011.
cnngo.com