Prof. Middendorf and Prof. Fehling (Department of Concrete and Masonry Structures) have been invited to give a joint keynote lecture at the 4th ACF/HNU International Conference on UHPC Materials and Structures (UHPC2024-China) in Changsha, China, 24 - 27.10.2024 accepted. In their joint 45-minute presentation with the topic: Material and Construction aspects of sustainable and ecofriendly UHPC they reported on their research results at the University of Kassel (Figures 1 and 2). The scientific program was followed by a look at bridge structures using UHPC (pictures 3 and 4) and a visit to the UHPC Bridge Research & Development Base laboratory at Hunan University in Changsha.