Link, please?
I wasn't aware that China had a problem with vacant cities — more like the opposite issue, unless you're talking about rural depopulation. But it definitely wouldn't be the first time I've learned something new about China.
• Satellite Pictures Of The Empty Chinese Cities Where Home Prices Are Crashing
business insider ^ | Dec. 7, 2011 | Gus Lubin
http://www.businessinsider.com/china-ghost-cities-2011-11#
The long-predicted crash has arrived with a vengeance in China’s original ghost city. Home prices have plunged by one third recently, down 60% from 2006, in Kangbashi, the ambitious second city built on the outskirts of Ordos. Developers, investors and migrant workers are all giving up on Kangbashi. “Ordos is the first of a number of these ghost cities that will see similar magnitude price declines