We can first of all declare that tariffs in the long run are bad for domestic innovation because the real competition is played out and there is no incentives to improve anymore.

Regarding the situation with China, actions must be taken because Chinese producers receive government subsidies, making it impossible to compete fairly. The challenge is to balance maintaining domestic innovation with reducing CO2 emissions, without ignoring the impact of external market forces.

I don't now how valid this data is might suspect that China needs to make some actions: https://ourworldindata.org/grapher/co-emissions-per-capita?tab=chart&country=CHN~European+Union+%2828%29