What point are you trying to make? I'm honestly not sure. Is it that China is polluting a lot? Or a little? That they are making environmental progress? Or none?
They they are exceeding their initial commitment. Talking about pollution in your tone is also a bit rich coming from the biggest net polluter in all of history.
Nobody can know and that's why it's interesting to you... arguing in bad faith. Take your unfalsifiable counterfactual challenge and go back to debate club.