The Research Institute for Sustainable Urban Development (RISUD) of The Hong Kong Polytechnic University (PolyU) successfully held its annual international symposium 6–7 July 2023 on campus. Under the theme of “Urban Sustainability through Innovative Technologies”, the Symposium brought together about 50 speakers from across the globe to deliver plenary presentations and workshops. Sponsored by the Ove Arup Foundation and Kwang-Hua Education Foundation, the Symposium attracted over 250 participants joining onsite from different parts of the world.