1. may face sudden and possibly to much decrease in population because they are beginning to only keep baby boys and they girl usually gets killed. they are also all only aloud one child.
2. not enough jobs for everyone, since there are so any people in china it is hard to find a job if everyone before already found a job and because of this then more buildings and factories would need to be built causing there to be even less space for people to roam.
3. over pollution. pollution often occurs in a over populated environment, things are littered all across the ground also because china has lots of food stand or restaurants that allows you to go outside to eat.
4. china is also facing a lot of water shortages and less and less forest everyday. since the growing of china was so rapid more forests need to be destroyed in order to make space for more people.