Simplify the following text for a Grade 10 native English-speaking person.
Original: The one-child policy refers to the one-child limitation applying to a minority of families in the population control policy of the People 's Republic of China ( PRC ) . The Chinese government refers to it under the official translation of family planning policy .
Simplified: The one-child policy or family planning policy is a policy introduced in the People 's Republic of China in the year 1979 .