Mao Yushi 1926 was born in Beijing, and 1950 graduated from the Department of Philosophy and Psychology of Jinling University. Now he is a researcher at the Institute of Psychology, Chinese Academy of Sciences and a famous child psychologist. She has been engaged in child psychology research for more than 50 years, and is one of the few psychologists engaged in infant intelligence tracking research in China. She pioneered the early education and training of mentally retarded children in China and contributed to the theory and practice of child psychology in China.