as is known to us,china has the biggest population in the world,which is more than 1,300,000,000.such a large population causes some problems in cities,that's the unemployment.too many people gather in cities and the jobs are not enough.some graduates can't find a job though they have left school for years.in addition,traffic jam is another problem resulting from the big population.there are too many cars on the roads and streets.

　　the situation of the countryside is not good.too many people live in the countryside and we don't have enough farm land for them.

　　fortunately,our government has realized the problems and has attached great importance to them.the government is trying its best to create more jobs and improve traffic systems.moreover,the one-child policy has helped a lot.