From Park Expansion to Networked Urban Green Infrastructure: Governance Linkages in Singapore and Implications for Shanghai

Urban green infrastructure (UGI) depends on connections between spatial planning, project delivery and long-term operation. This article develops a conceptual, document-based assessment of those connections using Singapore as a reference case and Shanghai as a prospective application context. Six analytical dimensions organise five governance linkages: planning to project rules; spatial networks to differentiated uses; interagency project delivery; professional stewardship to operational data; and participation to access and care. A source-level mapping makes the distinction between documented arrangements, institutional reports and proposed applications explicit. A 2025 professional study visit supplies contextual background, not interview or outcome data. The Singapore materials describe instruments joining governance functions, but do not establish continuous implementation or causal effects. Shanghai’s publicly released 2026–2030 ecological-space plan contains related commitments whose project-level operation remains untested. Four fit conditions address authority and accountability, spatial and climatic suitability, operating capacity, and public value. An illustrative application to published research on Portland shows how these conditions can structure questions outside Asia without demonstrating successful transfer. The contribution is an auditable heuristic for locating interfaces that require investigation, rather than an evaluation of city performance or a validated model of policy transfer.