Over building wasted assets on a titanic scale is bad.
Using and losing your crux population’s savings to do that ends your legitimacy. No wonder the CCP is talking up war with Taiwan.
Maybe Taiwan should offer a buyout? Nah, too sensible.
Read an article the other day about China investing heavily in industry automation. So they could loose workers but production might not fall off. Will have to wait and see.
Why? Fewer people but more automation means more productivity, and more money to go around. China is (nominally) Communist, and the party knows that they have to take care of people or there will be revolution - so they will take care of people, at least to some degree. (At least more than some other political parties I could point out.)