2023.08.08, Professor Jiayin Yuan from Stockholm University was invited to visit the Department of Macromolecular Science Fudan University. He gave an academic report entitled "Poly(ionic liquid) synthesis and applications in energy and environmental fields". His applications in functional polymers and carbon materials in sustainable development were introduced in detail. Prof. Chen hosted the lecture and Prof. Yan Lu from Helmholtz-Zentrum Berlin for Materials and Energy also visited.