>it was agreed that they would all aim to reduce emissions

No, it was agreed during Kyoto that developed nations would reduce emissions, and developing nations (aka PRC, India) would not. Developing nations could keeping scaling fossil to industrialize until Paris where all countries had to submit climate plan (again not explicitly to reduce), and PRC's was to peak emissions by 2030s, which they're on trend to do early. PRC did what was legally permitted / agreed upon, and if developed nations want to cope / be butthurt and label following the agreement as dirty and not cooperate in the future global projects because they're not financial beneficiaries then that's on them. Also "some" solar and wind is ~ROW combined, which surely is very unimpressive.

> sell the solution

Selling solution to problems is solving problem, selling solutions to problems cheaply is solving said problem faster. As if developed economies did not decarbonize by selling clean tech solutions... which btw PRC bought. PRC simply doing globe a favor by selling real climate solutions at cost and scale that makes global difference, instead of scaling retarded paper solutions like carbon credits from countries that primarily scales spreadsheets.