It is not surprising that embryo selection and other forms of eugenics are becoming mainstream in China. The logical conclusion of the Confucian circle of life, the idea that childcare by parents is repaid with elderly care by children, is eugenics. Birth rates remain low if potential parents believe that a potential child will not do well enough to help them in old age. In other words, the child will not ROI. Embryo selection either actually makes them better, or at worst acts as a placebo that makes parents believe in their children enough to create them.