Before revision: Background China single age population pyramid (2020) Beginning in 1979, China implemented the one-child policy, which stipulated that a couple could only have one child, resulting in a declining new population and a rapidly aging society.
After revision: VietNam+Background China single age population pyramid (2020) Beginning in 1979, China implemented the one-child policy, which stipulated that a couple could only have one child, resulting in a declining new population and a rapidly aging society.