fertility rate

Under the influence of modernization and industrialization, late marriage, non-marriage, and low fertility rates are inevitable phenomena, but they also bring many derived problems. For example, living alone or being single for a long time will affect the physical and mental health of people. When the number of deaths exceeds the number of births, the total population of the country will show negative growth, the population structure will tend to age, and the future dependency ratio will be more difficult.