because China is pushing for carbon neutral by 2060; also, China imports a lot of oil (that is another incentive for them to adopt green energy).
https://www.cnbc.com/2020/09/23/china-claims-it-will-be-carbon-neutral-by-the-year-2060.html
https://www.cnbc.com/2020/09/23/china-claims-it-will-be-carbon-neutral-by-the-year-2060.html