Mega City Plans in China

A friend of mine who saw "The Agony and Ecstasy of Steve Jobs" with me, sent me a link about the new plans to combine several large cities, including Shenzhen, into one mega city. Why in the world would you put these cities together with a total population of 42 million? According to the head planner, "It will help spread industry and jobs more evenly across the region and public services will also be distributed more fairly." Or maybe it's a way to turn the whole area into one giant industrial zone where the companies make the rules. We'll just have to see what happens.