China is at the forefront of the global hydrogen race, boasting the world's largest network of hydrogen refueling stations. With its ambitious clean energy goals and substantial investments, the country is paving the way for a future powered by this zero-emission fuel.
The coal plants are normally not active, actually. They have a policy that when building renewable energy, they need to hedge it with some amount of active power generation that can be used to supplement the green energy in times of exceptional demand. Since the new plants are rarely used, it's actually more eco-friendly than having to vastly overprovision solar panels or batteries for the 99.99% power requirement, when the 95% or 90% power requirement is a fraction of that (and the footprint of the coal plant used to stretch to the maximum power requirement is vastly smaller than equivalent solar power).
It probably would still be better to use nuclear power as a hedge, not coal, but it's not as economically viable to build a nuclear power plant that is rarely going to be active.
Where can I read more about this so that I can shut up the redditors
https://chinadialogue.net/en/climate/chinas-five-year-plan-for-energy-one-eye-on-security-today-one-on-a-low-carbon-future/
Wish I could read the actual 5 year plans cited in this article, but that's the best source I could find. Sadly, if you look up terms like "China coal backup" you get Reuters articles that fail to mention the fact the new coal power plants are only being opened for energy security, not for around-the-clock generation.