It's sus to ascribe countries as bad emitters because they're developing higher QoL instead of choosing to be stuck as subsistence shitholes with low per capita emissions. The only way for countries to stay at subsistence/developing per capita emissions is to stay susbsistent/developing. Of course some wierd people think that's fine.
A fairer description is PRC's moderate per capita emissions are converging with US high per capita emissions as QoL improves because average PRC citizen wants to live as well as average citizens of high consumption developed economies. But due to various physical constraints - less square footage per, less flying, less car ownership per capita due to density, PRC unlikely to pass US per capita - they're simply not setup to enable car centric, house+lawn levels of consumption. But PRC converging with west in QoL = PRC still primed for more catchup consumption = per capita emissions still has room to climb, while transitioning energy mix tries to sustain growth via greener methods of generation.
Meanwhile US's process of "decarbonization" = also becoming net oil exporter and largest lng exporter, the latter with evidence to be much more poluting than coal due to leaky infra. Which BTW adds, ~3 tons co2 per capita to US produced emissions, which single handly negates last 15 years of US "falling" emissions. Which BTW should be accounted for US emissions just like PRC exports are calculated in PRC emissions, but conveniently isn't. Meanwhile, PRC upgrading domestic coal to be cleaner, ceased construction of coal plants abroad, is net exporting green energy. That's without bringing population growth/decline trends. US adding 1.5m to US tier of emissions is like adding 12m Indians per year.