Short answer: China is growing old. This is inevitable. In 1980, there were 3 times more people in their twenties than there were people in their sixties.
Now, the number of people in their sixties is almost as many as the number of people in their twenties. And there are fewer younger people (below 20) and more people in their fifties that will soon be in their sixties.
This is inevitable.
But, China could get rich, right?