It's no news that China has grown exponentially in the last decade. I lived there twice, once in the mid-80's and again the mid-90's so a trip back earlier this year was 'mind blowing' to say the least. But one thing that struck me was that China is being constructed (or deconstructed ) almost entirely by hand.
Everywhere you look there are the tell tale hardhats giving the impression that every other person is either a construction worker or moonlights as one on the side.
The workers are usually from the countryside, the city folk call them 'potatoes' and look down at them never acknowledging the vital role these people are playing in China's transformation.