China is developing the technological and industrial base to take the US on in an arms race 10-20 years from now and win. Equal or greater population. High tech. Resource base. World class industrial exporter. Every previous adversary we faced had only two of these attributes. Germany, Japan, the Soviet Union. China already has three of the above. In 10 years it will have all of the above. I doubt this very much.
China is too busy oppressing it's people and it's manufacturing/engineering base.
In my opinion if anybody replaces the USA as the dominant world power it will be the EU.
And the EU is too busy depopulating itself and becoming overrun by Muslim invaders to be a superpower ...
Advantage USA.