A plan China doesn't want to follow is obviously a useless plan. This is a group effort, or no effort at all, one that penalizes the countries trying and lets the others do as they may, with significant competitive advantage.
But even IF somehow all the countries were truly serious about this, there is NO WAY practicably to get even close to the IEA "goals", nor even the Paris Goals, with massive dislocations and expenditures, truly massive. Or very quick nuclear power, which also is not practicable.
This is why I keep noting the obvious, there is no real plan. There are various goals and a lot of PR happening, and pretending we're actually doing something. I proposed a fairly actionable plan before, it wouldn't get to net zero 2050, but it is decently practicable with some considerable effort and focus. And we could do it at least in the US, but that's not going to fly obviously, we're just going to randomly throw money at wind and solar, as we have in the past.
And end up with a lot of money spent to achieve very very little.
It's time to 'fess up and face reality.