230x ship building advantage, more dry tonnage per year than entire 5 year US ship building program in WW2... US advangage over JP in WW2 aws charitably 20:1. That's just in one "mature" industry, PRC isn't just better in US, it's magnitude better than US ever was relative to peers. Another example is their revelation of _one_ gigafactory for 1k cruise missile components a day. JP is buying 400 tomahawks over next few years for 1.5B. PRC indicating they can do that in one shift. US has 4000 stockpiled, replacing at ~100 per year. Some of the production figures are very lopsidded. Meanwhile they're addding about as industrial robots/automation than RoW, and industry is going to get increasingly cheap renewable inputs. The advantages are snowballing.
US still ahead in aviation due to committing to mature tech, but PRC knocking out their 5th J20 already 100+ per year. SpaceX is next as PRC pursues their mega constellation. I think people are prematurely jerking to SpaceX payload lead, they have a short term competitive advantage in doing high capacity launches on "small/medium scale", read: American scale with ~40 resusable rocket fleet. It the economics justified it, no reason PRC wouldn't have 400 falcon 9s. The TLDR is once indigenize tech matures, PRC can pursue incredible economies of scale, and build up enough production capacity to exceed aggregate production of others in 5-10 years.