Supported by the Luce Foundation, this symposium will bring together two groups of scholars, practitioners, and policymakers from Trinity, the Hartford region, and the Yangtze River Economic Belt (YREB) in China respectively to present research and explore comparative policy issues regarding sustainable urban development and regional cooperation in a small and deindustrialized region (lower CT River Valley) vs. a massive and industrializing regional corridor from Shanghai to Chongqing.