Core Insights - The article highlights the construction of Shanghai's first subway line that crosses the Yangtze River, known as the Chongming Line, which is a significant development for urban transportation in Shanghai [1][4]. Group 1: Project Overview - The Chongming Line, officially designated as Shanghai Metro Line 22, spans 42.3 kilometers with approximately 83.9 kilometers of track laying planned [1]. - The project has overcome challenges such as long-distance tunneling, high water pressure, and complex geological conditions, with a major breakthrough expected on March 13, 2025, when the tunnel will be fully connected [1][4]. Group 2: Construction Details - The construction employs high-speed rail precast track slabs and precision measurement technology to enhance train stability and passenger comfort [2]. - Environmentally friendly, low-noise new energy equipment is utilized in the construction process [2]. Group 3: Technological Integration - A digital management system is in place at the Chongming Line's smart center, integrating data on safety, quality, progress, personnel, and transportation for comprehensive project oversight [4]. Group 4: Economic and Urban Impact - The Chongming Line will connect key areas including Shanghai Pudong, Changxing Island, and Chongming Island, promoting economic development in these regions [4]. - The ongoing expansion of Shanghai's metro system aims to enhance urban connectivity and support the city's development strategy, with a total operational mileage of 896 kilometers [4][5].