Back in 2004 I visited China.... I was Admazed, it's nothinglike what our media protrays. One of the many things that struck me most was they were atleast a Decade ahead of us in Cell Phone technology(GSM), and that was back in 2004, it was everywhere. It litterally took a Decade before the Technology I saw there started to show up in our phones here. Didn't matter where you went, you had service. Some tiny village, in a cave, out in now where, underground.....everywhere...
And Yes, They really do build that fast. Cranes everywhere. Work that would take us days, weeks, months...... they would do in hours, days, weeks.
As I stepped out of my apartment onto the street to go get lunch, a single guy was starting to cut the concrete exterior wall of a building. Upon my return in about a hour, a finished steel door completely installed, place all cleaned up. Finished and gone.
When they built 2 hospitals in a few weeks, I believe it.