My understanding on China's coal plants is that it's not the number of them, it's whether they're running that counts. Coal-fired generation is currently cheaper than storage for backing up wind and solar generation and their plants are typically running about 50% of the time right now, expected to run less often as storage and more renewables come online. So China’s coal use could fall despite it adding more capacity.
https://www.sustainabilitybynumbers.com/p/china-coal-plants