⭘ The pressing problems arising in urban development and complex challenges facing future spatial development can no longer be addressed by any single discipline, and a deeper interdisciplinary integration is on the horizon. Initiated by the curator Doreen Heng LIU, the Keynote Forum of the Young UABB Section "PRD 3.0: Balance is More!" will be held at the main exhibition venue of the 9th UABB. The young participants will present their interdisciplinary, integrated and innovative exhibits to the audiences, and discuss how to confront the future spatial challenges, respond to the urban issues on a local or broader scale, and imagine prospects of greener, safer, more resilient and sustainable future cities.