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].

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 after 208 days of continuous excavation [1][3] - The Chongming Line spans 42.232 kilometers, connecting key areas including Pudong, Changxing Island, and Chongming Island, with a total of 8 underground stations [1][3] Industry Significance - The Chongming Line serves as a rapid transit link between Chongming District and central Shanghai, enhancing development momentum in Chongming and improving the overall Shanghai metro network [3] - The construction of this line is crucial for supporting integrated transportation development in the Yangtze River Delta region [3]

Core Viewpoint - The completion of the last station roof for Shanghai Metro Line 22 (Chongming Line) marks significant progress in the construction of the first metro line crossing the Yangtze River, which is also the longest metro line in China to do so [1] Group 1: Project Progress - As of September 23, the last roof of the Yuyuan Station has been successfully poured, completing the main structure of all 8 stations on Line 22 [1] - All shield tunneling has commenced, with 24 out of 28 tunnels completed, including the section between Jinjil Road Station and Chenjiazhen Station [1] - The civil structure of 2 new main substations has been capped, and track laying has begun in segments [1] Group 2: Line Specifications - Line 22 spans approximately 43 kilometers and includes 8 stations, starting from Jinjil Road Station in Pudong New District and ending at Yuyuan Station on Chongming Island [1] - The line traverses through Pudong New District and Chongming District, crossing the Yangtze River twice via Changxing Island, with a maximum operational speed of 120 kilometers per hour [1]