Hi,
China is less concerned with purchasing power than it is with building its economy. So it the poor people in the country cannot purchase overseas goods, it is no matter. The rich, on the other hand, have no problems with purchasing foreign goods - they have tons of money. In any case, more and more goods are now being produced internally, since European, U.S. and Japanese manufacturers are building plants in China, thereby insulating China, somewhat from the problems of a relatively weak Yuan compared to the dollar.
But China is getting a little concerned with their depreciating investments in Treasuries which is why it announced that it will be diversifying its worldwide holdings and are also investing more in U.S. assets, which is most exemplified by the recent Blackstone deal. One thing China has in droves is cheap labor, and they are going to leverage that asset for many years to come. China simply needs to keep their economy and exports growing - their top prioity. The only thing that can derail this strategy is the American "consumer" (yes, that is what Americans are especially good at), who are literally going broke with debt and at some point will have to stop consuming and learn to live a life without obese consumption of all types. In the meantime, America's willingness to take on dept in order to feed their appetite keeps China's economy growing at an enormous clip.
Rich