The Western and Asian governments increased environmental regulations and the cost to do business rose. In China the government ignored its climate obligations and slashed environmental regulations and increased coal investment to drive energy costs down and thus the manufacturing moved there. You think Germany couldnt have cut environmental regulations slapped down a few coal plants and made solar panels?
Thats why there was climate meetings to get everyone on the same track. If everyone is aligned in their goals then the economic hurt is easier to bare. China intentionally captialised on this and I do not think they deserve any praise for it.
It's completely stupid to pretend China is going green when their emissions have continuously increased and the rate has even accelerated the richer they got.
It was all done so they could capture the business of western countries and run a silent economic war. Now most of europe is so dependent on China it's hopeless and they are not even cheaper because all kinds of costs have been added.