Yangtze River in Heibei Province ..

A man sits beside a road overlooking the Yangtze River in Heibei Province near the town of Badong in the south-west part of China November 5, 2007. China is facing the biggest mass urbanisation in human history, and must slow the pace of new building and persuade its increasingly well-off urbanites to live in smaller houses if policymakers hope to meet efficiency targets, analysts say. It is estimated that around 400 million people will flock to its cities over the next two decades, a third more than the entire population of the United States. Picture taken November 5, 2007.