To study the intergenerational transmission of innate factors such as maternal health, educational attainment, and intelligence, and how acquired environmental factors such as policy and parenting behavior influence the offspring's human capital through their interaction with heredity (gene-environment correlation - the correlation of genetic factors with environmental factors, the genetic factors are measured by polygenic scores, the environmental factors include family environmental factors such as SES factors and social environmental factors such as service quality of maternal and child care services).