In 1979 several provinces start explicit "One-Child" family planning initiatives. However, at a national level, China's "One-Child" policy begins in 1980, when the Central Committee is sending an open letter to all members of the China Communist Party and the Communist Youth League, in which the policy is officially adopted

Literature:

Greenghalgh, Susan (2005): Missile science, population science: The origins of China's One-Child Policy. In: The China Quarterly, 2005, 253-276

External Web Links:

http://www.iisg.nl/~landsberger/pop1.html