In the past decade, China's cities expanded at an average rate of 10% annually. The country's urbanization rate increased from 17.4% to 41.8% between 1978 and 2005, a scale unprecedented in human history. 80 to 120 million migrant workers work part-time in the major cities and return home to the countryside periodically with their earnings. Urban focus Image:Img13714.jpg Portal - news - feeds - / UK - news - / China -