The fundamental problem with China's growth since 2009, is that it has all come courtesy of truly massive amounts of debt.

To generate annualized 7% GDP growth requires five +/- times as much debt as they get in new GDP.

I don't see how an economic model built on growth via accumulating debt faster than any other country in world history has, is a sustainable model. They're courting disaster, and decades of stagnation, just like Japan did.