上海地铁崇明线全线隧道贯通

Core Points - The completion of the last tunnel section of the Shanghai Metro Line 22 (Chongming Line) marks a significant milestone, achieving full tunnel connectivity for the longest rail transit line crossing the Yangtze River in China [2][4]. Group 1 - The Chongming Line runs from the Jinqiao area in Pudong, covering a total length of 42.232 kilometers, passing through Pudong New District, Changxing Island, and Chongming Island, with 8 underground stations [4]. - The shield machine successfully reached the Chen Dong intermediate shaft after 208 days of continuous excavation, indicating the completion of the final tunnel section [1][2].