Interpretation of the Comprehensive Two-Child Policy: All the Details You Need to Know Aspect 1: The Background and Purpose of the Comprehensive Two-Child Policy The Comprehensive Two-Child Policy is based on the 2015 national census data showing that my country’s population is aging and the fertility rate is declining year by year. , a policy launched by the country to deal with the demographic crisis. The purpose of the comprehensive two-child policy is to gradually adjust my country\’s population structure, promote balanced population development, and alleviate the impact of population aging on the economy.