"All couples will now be allowed to have two children, the state-run news agency said, citing a statement from the Communist Party. The controversial policy was introduced nationally in 1979, to reduce the country's birth rate and slow the population growth rate. However, concerns at China's aging population led to pressure for change."
Lets not forget the expansion of china also with its economic strength and its military strength which is a threat to other countries in the area because china can take control and with Chinese moving into Africa and United states as residents china is going to need to populate its own country.
First implemented in 1979 and diminished in 2013 It is good to hear something like this has finally come to an end. Although it deemed successful by stopping the birth of an estimated 400 million babies, there were some places that allowed two children in rural areas if the first was a girl. It is assumed though that even though this is no longer a required policy, many couples may only have one child since it is accepted as a social norm.