So the way it works is : You get pregnant with first child .You have a baby and then go to goverment office to get his ID . And live happy ever after ...
But if you get pregnant with second child , Story is completely different you visit doctor , have baby and then comes the bad part : You visit goverment offices and they will not issue an ID for your baby unless you ay tax .
Tax prices vary in every place . For example in Beijin its about 60 000 Dollars per baby .
If you get pregnant with twins first time (first pregnancy ever ) then you dont have pay tax . Both of them will get ID tax free , but if you get pregnant with twins in your second pregnancy and have 2 babies - tax - Double .
If you don`t pay tax , then person is with......
He/She can not go to public school , cant leave country , can not sign any contract that require ID .. Many things ..And the only way for this person to get valid ID is to go to the government office and pay tax himself when even he/she can afford . (If parents can not )
So if you atre rich in china then you can have a s many children as you like , coz you can afford to pay tax , but if you are poor then its only one child allowed and later then every other child from there is with tax .
The reason it was implemented was that there are too many people in china , keep population numbers in order .