BACKGROUND
At present, China has fully opened up its three-child policy, but the low willingness of age-appropriate families for childbirth has led to a persistently low fertility rate. The family, as the smallest social unit of childcare support, bears most of the negative effects of childcare, such as the difficulty of balancing family and career, and the difficulty of gaining career advancement. And childcare providers in the family are often women. This means that mothers have to bear the burden of both career and family responsibilities, resulting in a physical, psychological and economic "maternal punishment" for mothers, and greatly reducing the willingness of women of child-bearing age to have children.