Shanghai 2030: The Making of a Global Megacity Region Section 1: The 1+8+3 Metropolitan Framework• Core: Shanghai Municipality (6,340 km²)• First Tier: 8 Direct Satellite Cities (Suzhou, Wuxi, etc.)• Second Tier: 3 Emerging Nodes (Nantong, Jiaxing, etc.)• Combined GDP: ¥16.8 trillion (2025 e