In the paper Flyvbjerg looks at infrastructure projects in a number of countries (not in China, though, because he needed decent data) and shows how the benefits of these projects are systematically overstated and the costs systematically understated. More important, he shows how these terrible results are simply the expected outcomes of the way infrastructure projects are typically designed and implemented.
It is not a very happy paper in general, but I am pretty sure that many people who read it probably had a thought similar to mine: if infrastructure spending can be so seriously mismanaged in relatively transparent systems with greater political accountability, what might happen in a country with a huge infrastructure boom stretching over decades, much less transparency, and very little political accountability? Isn’t the potential for waste vast?