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I apologize for being critical, but that piece is extremely ignorant of what China is actually aiming to do.

Were the city builds part of economic stimulus? Yes, of course.

However China also has a goal to move 250-350 mm citizens into urban living by 2025.

Here's a 2009 report on the subject:

http://www.mckinsey.com/insights/urbanization/preparing_for_...

Without being rude, my link is substantially more weighty / less noisy than yours.