Here's a demonstration I think is instructive. People who have been around long enough remember the press hysteria of the early 2010s about China's air pollution, with neologisms like "Airpocalypse" regularly thrown around. This is a representative sample of the kind of thing that was going around then:
You don't read much about that these days and you might wonder why. Well, wonder no more:
Compare that with Los Angeles
At the time of writing the PM2.5 levels in Beijing are 25 micrograms per cubic meter. Far from great, but a
vast improvement over the >100 microgram per cubic meter it was a decade ago. For further comparison, LA's number is 14 micrograms per cubic meter. When China makes progress on a problem, the press stops.
This comparison is instructive in more than one way. Even what is ostensibly a neutral, factual publication is suffused with the usual insufferable Western cultural megalomania. Beijing should "reduce emissions" to improve its air, while LA's air quality is a result of geography and weather. LA doesn't have to "reduce emissions", perish the thought. And Beijing doesn't have weather or geography, as I'm sure you know.
I hope the point of this analogy hasn't been lost: When China identifies a problem, when it commits to solving it, it gets solved. However many years and decades it takes. This demographics issue is no different.