Dr. Xuechen Ding is a Ph.D. in developmental and educational psychology, associate professor at Shanghai Normal University, master's tutor, graduated from the School of Psychology and Cognitive Science at East China Normal University, a member of the Youth Working Committee of the Chinese Psychological Society, a member of the Moral Education Working Committee of the Shanghai Psychological Society, and a member of the Shanghai Normal University Children's Center for Development and Family Research. His main research field is children's social development. In recent years, he has focused on children's social withdrawal, rejection sensitivity, peer relationships, social and emotional adaptation, and other topics.