Their panels will blot out the sun. Their hydro-electric dams shall dry up the seas. Their wind turbines will choke them of air. Even the ground beneath their very feet aren't safe, as the geothermal power plants will freeze the land below them. Taiwan will be begging for them to switch back to coal by the time China is done with them.
I agree that energy security and geopolitical considerations are behind China's all out expansion, I've said so before, but in this particular case, I wonder if you might have overlooked an implied /s?
Blockading the Malacca Strait isn't a worry for China when domestic production and Russian inports fill the gap.All of this green energy helps tremendoualy for keeping the country ticking along during a time of war.
Energy security for China is the real benefit here, it'a nothing to do with being environmental.