Some people say that there are more than 1.6 billion people in mainland China now,although the official figure is 1.3 billion.
Why are there so many people?Why is the official number different from what some non-governmental scholars say?
The main reason is that many people,especially those who have little education,are too fond of having babies.
It seems that those people are so interested in giving birth to children when they are free.
And there is the law against having more children.
But those people become so smart and clever when they are working out strategies to have children secretly.That is why there are so many unregistered citizens in China.
