This book introduces part of the advances of the aging research conducted by Dr. Yang Wang and his collaborators since 2022. It covers several topics related to older adults, including their psychological and social well-being, their role as caregivers and care receivers, the impact of the maltreatment experience in early life, and how witnessing elder abuse could influence children. This book is composed of nine research articles and manuscripts. Most of the studies were conducted in China or USA, using nationally representative sample. This book is a valuable resource for readers who care about older adults' well-being and the advancement of it.