LOL per capita Americans emit more CO2 from burning gas than Chines do from burning coal
Also per capita Americans emit more CO2 from burning oil than Chines do from burning coal
And again, per capita numbers are uninteresting, because most people in China produce relatively little economic output, and the usage of people producing minimal economic output is uninteresting precisely because that is an indication of an underutilized resource, rather than an indication that this is as much energy as those people will need going forwards.
The eventual expected state of an industrial economy is one in which almost everyone produces significant economic output, because that's just how economies almost invariably develop over time. So in a couple of generations, assuming stable population, their energy usage will absolutely explode as their economy becomes more efficient and larger percentages of people end up doing jobs that produce higher levels of economic output.
That's why the only important metric when it comes to how a country is doing environmentally, IMO, other than perhaps the rate of population growth or decline, is emissions per unit of economic output. Because once you have that, you can compare how much countries produce with how much they pollute. You can also divide it by the percentage of people in that country who are actually producing meaningful economic output and get a good approximation of what that country's emissions will eventually be when everyone starts producing high economic output in a few decades. When you do this, you conclude that China will be a disaster environmentally if they don't stop ramping up coal production.
It really is that simple.