Shanghai Vanke UNICITY redefines megaform urbanism through integrated ecological infrastructure. Spanning 35 hectares, this TOD complex heals urban fragmentation caused by elevated highways and rail depots, creating 3km of continuous waterfront greenways and multi-level social corridors. The project's "Sky Prairie" roof garden pioneers ecological restoration with native vegetation, while urban acupuncture strategies convert flood control infrastructure into permeable parks. Its microclimate systems reduce heat island effects, and 15-minute walkable communities empower local residents. This replicable model demonstrates infrastructure as ecological catalyst, setting benchmarks for sustainable mega-developments in high-density contexts.