Under the Paris Agreement, China could INCREASE its emissions by 3.4 billion tons between now and 2030... which is the exact amount that ALL of the EU emits today. The globe has to spend money and limit emissions, while China gets to promise to eventually peak and then stop (as if Chinese Communist promises on Social Issues are worth anything).
China is the problem, not the US. In 2015, the top emitters were: China at 10.4 billion tons, US 5.4, EU 3.5, India 2.5, and Russia 1.8. China is emitting more than US-EU-Russia COMBINED, and is allowed to add another EU... all while the rest pay and reduce... and all this multi-multi-trillion-dollar effort so that the planet MIGHT be 0.3 degrees cooler in the year 2100. No thanks.