I don't think China is doing as well as many Chinese might believe but this doom of China is predicted every other year. Chinese companies are making strides in battery tech ( CATL ) and robotics ( DJI, Siasun )
demography is their doom
They can lose entire countries worth of people and still have a plenty of engineers to run circles around others.
maybe but a time bomb is still a time bomb
According to some China has been finished for ten years now. When are they going to go bankrupt?
Why is China finished? They have manufacturing, talent, and a large internal market - and whatever financial problems they might be facing are rather virtual.
and no babies so demography is going to hit them really, really hard
How would that hit exactly look like?
GDP destruction. You cant have high GDP without people to sustain it. with all the consequences you can expect on its economy.
Wouldn't GDP per capita stay the same?
You definitely can have very different amount of GDP with the same number of people. Why would less people mean lower GDP than simple proportion would suggest?