Even if they mandated non-stop births from all capable females by law, it still wouldn't catch up to declines.
replyhttps://www.piie.com/research/piie-charts/2024/chinas-popula...
Massive immigration (on a scale never seen in human history) would be required. I don't see that happening with one of the most xenophobic cultures on Earth.
This isn't a problem confined to China, they just have the worst numbers. The entire "first world" is facing declines of varying degrees.
This coupled with climate change is why immigration policy is probably the single most important thing for most countries right now.
Massive immigration would cause the system to completely collapse as imported people will not respect the local economy, culture, etc. in the same as natural citizens that originally built the nation. That's not xenophobic, just reality. Importing people means importing their culture, which might be incompatible with the state.
replyIt's a reason they began to be called nation-states - states without a nation backing it tended to flop, and nation's without a state tended to slowly (or quickly) be absorbed into the dominant culture.