Lijun Song is an Associate Professor of Sociology and Director of the Social Networks and Inequalities Lab (SNAIL) at Vanderbilt University. Her research focuses on how societies produce and reproduce inequalities, with core interests in social networks and health. Currently, she is developing social cost theory to explain the detrimental impact of social networks and is leading a high-priority R56 project, funded by the National Institutes of Health, to design the first nationally representative survey of older never-married adults, focusing on their social networks and health. She has received two publication awards from the American Sociological Association (ASA): one from the Section on Asia/Asian America and another from the Section on Sociology of Mental Health. Additionally, she has been elected to chair two ASA sections: Medical Sociology and Sociology of Mental Health.