I wonder how much China’s decline corresponds to the level of communism/corruption exerted by the government.
Here's something else to ponder - the march of Islamic terrorism. Both China and the USA are better poised to ride it out than Europe and other civilized nations. Europe is going down the tubes. Some Pacific nations and large swaths of Africa also impacted.
I believe that despite China's decline in economic prosperity, they will recover. And the USA will soar again. So will other nations like Korea, Japan and a few others. This economic race between China and the USA is of minor importance compared to the wars about to rage elsewhere on this planet. Sad to say, but the misfortunes of Europe and elsewhere will mean prosperity to China and the USA.