They have vastly different CO2 emission goals according to what is 'fair', compare:

https://climateactiontracker.org/countries/usa/

with:

https://climateactiontracker.org/countries/china/

Despite that China's CO2 emissions are increasing and the US emissions are decreasing, China meets its goal while the US does not.

The following page explains how these goals were set

https://climateactiontracker.org/methodology/comparability-o...