Meeting climate goals has to create an actual advantage for countries or well avoid them punishment from the international community. Blind cooperation is nice in theory, but it just does not work in practise. So we need proper funding from the wealthy countries, maybe leveraged from tariffs based on historic emissions, which then can go to poor countries, which only recieve the money, if they meet certain targets like stay below emission per capita levels or new fossil fuel infrastructure. At the same time we need to punish current emissions. For that systems like emissions based tariffs would work well. Other things can be done in trade agreements as well. I really like tariffs here, because they create a real monetary insentive for good action and that is kind of what works.

But be nice to China, otherwise they kill the planet is not going to work. Same story for the US and every other country on the planet. Nice words from politicans do not save the climate.