The Yangtze Delta Megaregion: How Shanghai's Influence Reshapes Eastern China SECTION 1: THE 1+2+6 MEGAREGION MODEL• Core-Periphery Dynamics: - 30km radius: Immediate suburbs (Jiading, Qingpu) - 100km radius: Satellite cities (Suzhou, Jiaxing) - 300km radius: Economic partners (Nanjing, Hangzhou) • Infrastructure Net