America is not a small population country and is still per capital emitting more than China; while China is now on a downturn (admittedly from a very high absolute level of emissions)
Chinese coal *consumption* seems to be trending down, not up, regardless of capacity: https://www.carbonbrief.org/analysis-chinas-co2-emissions-ha...
Sure, we've seen this rodeo before, circa 2015 -- when it dipped a few points, then it continued on its march toward coal supremacy since.