The Delta Equation: How Shanghai's 120-Kilometer Economic Radius is Rewriting Urbanization Rules in the Yangtze Basin

I. The New Commuter Calculus• 43-minute magnetic levitation commute from Hangzhou• Cross-border residential patterns in Wuxi-Shanghai corridor• The rise of "tri-city households" with members in Suzhou, Shanghai, NingboII. Industrial Symbiosis