Qixin Cai is a Ph.D. Researcher at Renmin University of China and University of Pennsylvania. He holds an M.P.A. (Social Welfare) from the University of Macau in Macao SAR, China, and has previous experience in administrative, teaching, and research roles at the University of Macau. His research interests encompass Population Aging, Social Policy, Child Welfare, Poverty, and Longitudinal Data. Currently, he is dedicated to employing interdisciplinary approaches to explore various aspects of population aging and health in Low- and Middle-Income Countries (LMICs).