Airport Connecting Line Project of Shanghai Rail Transit Municipal Line is the first batch of national city railway demonstration lines determined by the National Development and Reform Commission. After completion, it will become the most important East-West fast track in Shanghai rail ransit. It can quickly transit to Pudong and Hongqiao Airports, facilitate traffic travel, relieve traffic pressure, connect the economic hinterland, greatly enhance the competitiveness of Shanghai international aviation hub, and further promote the integration and higher quality development of the Yangtze River Delta