China is making a lot of moves towards efficiency, their train network for example is outstanding and they’ve invested huge sums in renewables. Plus it’s silly comparing effects of different sized populations,

The average Chinese person uses far less energy than the average American, about 10.1 tons of carbon pollution annually compared to 17.6 tons in the U.S., according to analyses from the Rhodium Group.

https://www.nytimes.com/2023/07/19/climate/us-china-climate-issues.html