Nearly a quarter of a billion Chinese workers relocated from the country's interior to the factory towns on the coast in one of the largest human migration the planet has ever known. Now, 20 years later, the great migration is drawing to a close.
With all this information technology at our disposal, it's striking how getting to the truth of a matter can still be so tough. Two tech stories from opposite sides of the world today remind us how even in 2012 the flow of information is still tightly controlled.
As China prepares for the first leadership transition in a decade, Marketplace's Rob Schmitz talks to passengers on China's slowest and fastest trains to find out whether they think country is on the right track.