1. What matters is absolute emissions, period.
2. The US has invested in pollution control for decades, so on an inflation-adjusted basis the aggregate investment by the US would be far greater.
3. As the largest polluter & the largest manufacturer it makes sense China's investment would be greater, but see #1.
Furthermore, China is now a world leader in both solar and nuclear, and they're actively exporting this technology. The reality of the situation is that investing into clean energy is very profitable, and China has now secured its position as the world leader. When other countries start getting their act together, they'll be buying this technology from China.
As they say, necessity is the mother of invention. Who gives what China is failing at: we need a technological evolution that works with the planet.
Folks who say, “well they’re not doing it so why should we?” Are abdicating all responsibility and are probably lazy citizens to begin with.