https://www.bangkokpost.com/world/2704901/in-rare-display-us-china-friendship-carries-climate-summit
China doesn't believe in climate change any more than Russia does. But it understands the need of Western Democracies to always be in crisis mode, to get their citizens to follow the leaders.
China is like parents humoring their children. Of course Santa Claus is real! The climate hysteria is also pushing the development of alternative energy sources, though this could happen more sanely by normal development.