Multidimensional Catalysts for Public Space Regeneration in Historic Urban Areas: An Exploratory Case Study of Guibeicheng, Wuxi, China

In the context of China’s stock-based urban renewal, public space regeneration in old urban areas increasingly requires attention to everyday use, inclusive access, local memory, and collaborative governance alongside physical upgrading. Drawing on catalyst theory, this study builds an analytical framework linking catalyst classification, potential element identification, effectiveness evaluation, actor collaboration, and renewal strategy transformation. The Guibeicheng area of Wuxi, China, is examined using semi-structured interviews, cognitive maps, qualitative coding, space syntax, the analytic hierarchy process, and actor collaboration analysis. The analysis indicates that behavioral and narrative catalysts are closely associated with residents’ everyday use and place identity. Event catalysts may generate phased amplification effects under specific conditions, while organizational and rule-based governance catalysts mainly provide support conditions for sustaining catalytic effects. Comparing space syntax results with cognitive-map and interview evidence further points to mismatches between configurational potential and perceived everyday activation. These include high-integration spaces with limited evidence of repeated everyday use, high-choice nodes mainly associated with pass-through use, weak everyday connections to historical resources, and limited independent organizational support for high-priority catalysts. On this basis, the study proposes a renewal pathway that combines everyday behavior guidance, event transformation, local narrative embedding, and organizational governance coordination. The findings provide a case-based reference for catalyst-oriented public space regeneration in historic urban areas and suggest potential implications for social sustainability, cultural continuity, and community resilience through spatial activation and long-term collaborative governance.