We are not in a kinetic war - so using 'wartime measures' of how China can win is an irrelevant gauge of Chinese economic wellbeing in peace time.
If your frame of reference is that Chinese people work harder (to produce more) while making less (nominal wages) per hour of incremental work they put in to satisfy your wet dreams of China winning in a hypothetical war, then you do you.
Idiotic. The main crust of my post is that China is a far bigger economy because the consumption figures of everything -- cars, steel, electricity, etc. -- are in multiples of the US. Chinese people can and do buy more than anyone else in the world. They enjoy the latest in cellphones, games, HDTVs, autos and other goods and luxuries in far larger quantities than any economy in the West, including the US.
War is actually the weakest part of these equation. China only uses 1.6% of its economic might on the military.
The point is simply this -- there is no way that economy of a country that consumes twice as electricity as the US and whose demand is growing exponentially faster than the US can be smaller than that of the US or being losing ground to the US when the US demand in electricity has basically flatlined over the past decade.
China is the far bigger economy in peacetime and given the time to develop, it would only build upon figures that suggest that China might already be twice the size of the US economy. To be honest the only advantage the US has is in war. It certainly not in the economy.