Even the population increase or more human source,
the econonmy of china still not be improved.
Because the money is not enough, and the food is not enough.
For example,
In Taiwan the less wage with more prices
which let many young man have no enough money to marry or have a baby.
If the population increcase,the food & many things will more expensive.
Because the resource is limited but human is not limited.
There are too many people to share the resource in the world.