I've seen people argue the real numbers of the decline for China are much worse than they have shared and they may already be past the point of no return like Japan and South Korea. It's going to be interesting to see how they handle an aging population.

Asia does have a more recent tradition of kids being the retirement plan so they might fair a little better than places like the US where that is not the norm anymore. The US with their infrastructure crumbling from underfunding and a general lack of care, should provide a good side by side comparison of the ride down with the differences of family versus industry support of seniors.