china isnt communist, its market socialism. chinese companies are traded on the stock market and are invested in by foreigners. all of these companies get go up in value the more they build so they keep building. eventually you do run out of things to build that investors are willing to invest in like japan did in the 1980s and then you get stagnation (the japanese stock market is exactly where it was 40 years ago and japanese wages havent increased at all) but china's solution is to shrink their population down to around 250-300m so the wealth of the nation is higher per person, at usa levels
United States