Where did you get that information? I just searched it online and the first results say about 33% efficiency for coal plants and between 25% and 30% for gasoline engines.
I'll edit my coment in a few minutes with the links to my sources.
edit: those efficiencies are energy efficiencies, completely unrelated to emmissions. I did not find any sources for emmissions efficiencies, but I'd guess knowing the energy efficiencies that coal is worse for the environment than gasoline.
???
That's TikTok, from a private corporation. They do not represent the CPC or the Chinese Government.