a financial crisis isn't the end of the world when and if it happens. in the long term states, nations and peoples can survive these things just fine.
and demographic crisis is hitting the west just as hard as china, plus the local circumstances make it much worse in the west because here it's coupled with mass immigration which results in straight up ethnic displacement over time.
for the west, low birth rates mean you're gonna be outnumbered and dominated by immigrant populations, the same immigrant populations that are constantly being taught to hate white people for their evilness. as soon as these hostile immigrant populations capture enough state power, this will result in increasingly oppressive state discrimination against whites, eventually culminating in genocide.
compared to that, chinas birth rate problem is a meme. they'll have to figure out a way to handle increasing numbers of retired boomers, at worst this means a lower material standard of living. not great, but continuing industrialisation and technological progress can offset a lot of these problems through increased efficiency and productivity. their problems are not at all comparable to the bleak future awaiting the west.
A financial crisis becomes more scary the more that developed countries are forced to be dependent on each other. The EU cannot function defensively without American military infrastructure, and they've just shot themselves in the foot by shutting off gas coming in from Russia.
As for the Chinese, comparing China's demographic crisis to the West's is comparing apples to oranges. The CCP importing foreigners from SEA to replace boomers exiting the workforce would be doing the unthinkable. The Han have hegemony over the entire country in every societal aspect that matters and are becoming increasingly nationalistic under Xi; they have absolutely no intention to ceding any ground in that regard to foreigners, considering how they treat ethnic minorities in their regions of origin. They're really banking on maintaining a Han majority
The West meanwhile is dealing with a separate crisis that has nothing to do with replacing boomers, if that problem existed at all. We're not facing a surplus of laborers dying off and having no one to replace them; instead, we're importing cheap unskilled labor for various, mostly insidious reasons, arguably the worst among them is to create a reliable voting base for the next 18 or so foreseeable years for whatever party in your country supports a lax immigration policy, national cohesion be damned. I do agree with you that this is a problem, but I view it as a consequence of mass immigration rather than a stated goal.
However, birth statistics from the past decade have shown that the birth rates of Hispanic Americans have been declining while white birth rates have conversely been rising, and blacks, Asians, et al have stayed roughly the same for the past thirty years due to disparate factors that affect each demographic. It also doesn't help that the cost of living has become so absurdly high that married couples waiting a few years to so much as have their first child has been normalized for more than a decade. The Western Left has also become far too reliant on immigrants voting as a bloc and are watching this strategy backfire in real time, at least in the United States.
It's subtle, but you can see the tide turning in Europe as well. You got places like Sweden and Germany who spearheaded the asylum efforts to Syrian refugees in 2015 doing a full 180 six years later and telling muzzies "fuck off we're full." Covid has curbed immigration for a number of reasons, but the one you don't hear being said out loud as much is how paralyzing the economy makes it harder for the goverment to provide gibs to third-worlders who might not even have a job waiting for them anyway.
TLDR Both countries are beset by different demographic crises whose outcomes are yet to be determined cause the societal landscape of the entire world is chaotic af right now, also centralized global economy bad.
Also, learn to fucking punctuate and format your posts. I'm getting eye strain reading your uncapitalized and poorly punctuated word vomit.
