A hugely disproportionate amount of China's CO2 emissions (compared to the West) has been in construction [1].
China has built a mind-bogglingly insane amount of housing in the last 30 years - and given its population growth - it will not need to continue emitting CO2 for construction at this rate.
China's second biggest source of emissions is Coal. This is becoming rapidly uneconomical in China. And unlike in the US, it doesn't seem like the special coal interests are given much consideration. This source of carbon will likely be 90% gone within 20 years.
Finally - China does not have much oil, and seems to have very little interest in importing massive amounts of oil for cars. China is RAPIDLY moving to electric vehicles. And already, China uses much less CO2 per capita on transport than the West.
If China is going to be a long-term problem on emissions - it's only because 22% of the world's population lives in China - and China is no longer poor. It's not going to be because Chinese people insist on driving gas powered vehicles everywhere and eating bacon 24/7.
[1] https://chinapower.csis.org/china-greenhouse-gas-emissions/