This would be an exciting challenge: construct a 2,749’ - 4 ⅛” (over one half of a mile) tall building in 90 days!  It seems really ambitious (on multiple levels) but the company, Broad Sustainable Building (you will have to be fluent in Chinese, or turn on Google Translate to check out their site), does have a track record of doing things really quickly.  For example, they completed a five star, 30-story building in 15 days!  I guess it would be safe to say these buildings are pretty well thought out by a good team of consultants, collaborating with the builder, but then again...they aren’t always.  You probably remember this collapse from a few years back. Is it possible to do anything remotely close to this here in California?  I would like to think anything is possible, but it seems this may be too daunting a task.  Our construction schedules are measured in months, not days--and unfortunately for some projects, it can take years to see them through to completion.  I would welcome the challenge!  Anyone with me?  We just need the project now...