Your figures appear to be way out.
In terms of industrial production, the US is behind China but not by much: https://www.worldatlas.com/articles/10-countries-with-the-highest-industrial-outputs-in-the-world.html
In the military side, your global research site puts the number of men fit for service in China about 600 million, whereas in the US it is 100 million. It wouldn’t just be the US against china, if there was a war, Europe and Japan would be on the US side I expect.
Neither side can afford a war