My research on personal asset and its role in human development during my PhD training has led me to focus more on this area. Whilst the whole life span is plastic and changeable, the physical, cognitive, psychosocial, behavioral, and academic ingredients that develop in the first twenty-five years (e.g., completion of university) lay critical foundations for the rest of life. Although young people in the contemporary era are enjoying the fruitful achievement of economic prosperity, globalization, and technological advancement, they are also encountering challenges such as unstable geopolitical issues, racism, social polarization, economic inequality, and health and natural crises. Against these backdrops, promoting young people’s positive development is thus a key task for psychologists and educators. My current research in this area focuses on contemporary young people’s emotional and behavioral development, well-being, and adjustment during transition from a bioecological perspective. In particular, I strive to understand the developmental patterns of the focused aspects, the factors and mechanisms driving such development, and their short- and long-term effects. Representative papers of this area are: adolescents' depressive symptoms and life satisfaction, adolescents' gaming disorders and problematic internet use, college freshmen's academic adaptation, and university students' aggressive beliefs during social movement. My projects related to this area include but are not limited to: