"For thousands of years, sons have been highly revered in Chinese culture. Sons were expected to carry on the honor of the family name, wealth, and the expectation to provide for his parents. Males dominated all aspects of Chinese life. In 1979, China introduced one of the world's most extreme state mandated policies for population control, one in which all married couples were to be restricted to having only one child. Even immediately after its implementation, the Chinese continued to believe in this cultural value in males."
January 1, 1970
https://en.wikiquote.org/wiki/One-child_policy