And it's still building nuclear plants a decade after it decided to concentrate on solar + coal. Plans have lead times and inertia, and China doesn't want to put all of it's eggs in one basket. They'll keep building coal and nuclear at a low rate for a long time to ensure they never lose the core knowledge on how to build them so they're always available as an option.
china is building coal plants because china has coal deposits. Please can you answer the question of where China is supplying its growing electricity demand? it is mostly coal or not?