Exploiting workers impoverished by communism while polluting their environment is not a "sound technology". A Chinese solar and wind powered economy is still totally nuts. The real reason electric emissions fell is due entirely to horizontal fracking technology making fossil gas energy cheaper than fossil coal.
The Chinese aren’t the only ones making solar panels. The replacement of coal by gas is a HUGE factor, but to say it’s the entire reason is just simply false and ignorant. Electricity production by coal dropped by 228,000 GWh, but production by natural gas only rose by 78,000 GWh... making it responsible for only about 1/3 of the decline in coal use.
You just cited a fact you thought “must” be true because it fit your world view regarding energy which hasn’t been updated in years.