Core Insights - The Tianjin Metro Line 7 Phase I South Section officially commenced initial operations on September 28, enhancing the city's rail network to a total of 12 lines, thereby improving public transportation accessibility for residents [1] Group 1: Project Overview - The Tianjin Metro Line 7 is a key north-south line running through the central urban area, with the south section spanning four districts: Xiqing, Nankai, Hexi, and Heping, featuring 15 stations [1] - The construction of the line includes significant infrastructure work by China State Construction Engineering Corporation (CSCEC), which built two stations and two sections of the line, totaling approximately 3.48 kilometers [1] Group 2: Construction Challenges and Innovations - CSCEC faced multiple challenges during the construction of the Tianjin Metro Line 7, including deep foundation work and managing complex underground utilities, while employing innovative Building Information Modeling (BIM) technology to optimize construction processes [2] - The Dasi Depot, covering an area of approximately 31.9 hectares and with a total construction length of about 2.4 kilometers, serves as a critical facility for train storage, maintenance, and material supply, with CSCEC achieving high standards in its construction tasks [2]