I've run across several articles like this over the last few months. Each of them has had a fair amount of supporting data. I think China has a serious problem.
No surprise. China has the double whammy of having aspects of both unfettered robber-baron capitalism, and communist command economy to fudge the books and sweep unpleasant realities under the rug, and engage in vast amounts of what can only be described as "economic theater". Such as those huge empty ghost cities full of sky scrapers and apartments. And the possibilities they'll never see a return on the potentially flawed Three Gorges Dam.
The idea that in the long run China will "own us" is as laughable as the worries Japan would back in the 80's and 90's.
Not to mention the resource and population problems they have. Severe infrastructure problems in the rural periphery. Looming ecological disasters equivalent to the American Dust bowl, and sex-selective abortion and infanticide creating a male female disparity that may be as big as 40 million "excess" males, and growing, by some estimates...
China is like a race car where the wheels are about to fall off, the engine explode, and the gas tank is almost on empty, but the driver is responding by flooring it, in hopes of driving faster than the car will fall apart.