Emissions might not be that telling, since the per capita emissions of the Chinese population should only rise a bit in this decade, before starting to fall (more green energy and nuclear).
It is far from accurate but it's fair to say there is a certain trend to emissions data once you account for major factors.
It is a useful litmus test just like GDP per capita is also a useful litmus test (it's still a highly inaccurate way to figure these things out).
Point is that there is a pattern to take note of with emissions. Literally all the industrialised and developed nations with the higher standards of living and all associated metrics have high per capita emissions. Single out all the tech dominant ones (USA, Japan, Germany, South Korea, France, Sweden, UK) and they also measure up. These two are obviously hand in hand EXCEPT when it comes to China. China is NOT a developed nation yet with similar comprehensive top tier, non-political, indicator metrics (although mostly up there in 80%+ categories) but China IS absolutely a tech dominating nation even ahead of a few on that list in multiple domains and in multiple
ways.
So China is the only
current outlier when it comes to tech and industry along with development but this was also the case for Japan and South Korea before they were above those "developed nation" indicator metrics. Russia ain't an industrial or tech slouch at all (despite losing ground post Soviet Union) and isn't anywhere near comprehensively above those metrics either. In many ways even below China.
All this is to say if we consider China's overall results on development indicators and litmus tests like GDP per cap (as inaccurate a picture as that may build) and emissions per capita, it's abundantly clear that China can do a lot better and will since it is developing and progressing and finding new things to improve on. If it were to reach a benchmark peak of Japan/USA overall productivity and efficiency, China would be several times "bigger" than the USA at its peak. 300 million people and 1500 million people at the same individual productivity level.
USA has one major advantage and that is the fact it still attracts a lot of the world's best and brightest and hardest working because it offers some of the most renowned, well funded, experienced, well connected etc industries and great pay. Not to mention better overall living standards than China currently offers. The irony of increased US violence and racism is that fewer East Asian talents are making a life there compared to the past and some established ones are leaving.
China has the advantage of homogeneity and the relative social harmonies that come with homogeneity. Chinese people also have measurably higher IQ and not by insignificant levels either. That
does help as we can see in Indonesia and Malaysia migrant and development over the years where higher IQ develop nations and industries and move towards the top of the social pyramid. Then we have examples of South Korea, Taiwan, Japan, and Singapore knocking it out of the park in such short periods of time, recovering from colonialism, war, civil war, being robbed clean and so on. Chinese Indonesians and Malaysians had to deal with real and actual, proven and acknowledged genocide (not CNN genocide) and still within generations, move to the top and are almost the exclusive contributors to tech and industry in those nations.
However, China's homogeneity comes at the cost of diversity of thinking. There is something to be said of the benefits there but the drawbacks almost completely offset those with other inefficiencies and conflicts that arise from identity differences. Especially considering a society that cannot deal with those conflicts well enough.