That is why I see China having a chance more than many other countries. What good is it being "the best" in aspects such as GDP production, military, technology, or any other major aspect of a big player in the world if you cannot even keep up a replacement birth rate. You cannot have a lasting major power if you cannot even sustain it with human capital.
So if China ends up making the changes they would need to make to reverse course, they may just win by default.