A China Urban Development Report released by a mayors’ association predicts that the size of the nation’s mobile population will be 200-300 million in the coming two or three decades. “The complex dynamics of its (migrants) geographic distribution, composition, and quality is posing a severe challenge for national strategic planning, the government’s social management, and public services.”
Source: Xinhua, May 30 2011
http://news.xinhuanet.com/2011-05/30/c_13901731.htm