Core Insights - The construction progress of multiple subway lines in Qingdao has been reported, indicating significant advancements in the city's infrastructure development [1][2][3] Group 1: Subway Line 7 - The left line shield tunneling of the subway Line 7 Phase II between Blue Ao Road Station and Heshan Road Station has been successfully completed [1] - The total length of Line 7 Phase II is approximately 16.9 kilometers, with 14 stations planned, divided into northern and southern sections [1] Group 2: Subway Line 9 - The first auxiliary structure, the No. 2 wind pavilion retaining pile, at Huicheng Road Station of Line 9 has been successfully completed, laying a solid foundation for subsequent construction [2] - The total length of Line 9 is 16.36 kilometers, with 13 stations, starting from Haixi Village Station to Qianjin Community Station [2] Group 3: Subway Line 15 - The first segment of the top slab at Jingcheng Road Station of Line 15 has been completed, facilitating the subsequent shield tunneling between Jingcheng Road Station and Chunyang Road Station [3] - Line 15 is a key project in Qingdao's third-phase subway planning, with a total length of approximately 30.8 kilometers and 17 stations planned [3]

Group 1 - The construction of Hangzhou Metro Line 18 Phase I is progressing well, with most stations entering the foundation excavation stage, marking significant advancements in the project [1] - The Huajiachi Station's parking line features the "Triumphant" shield machine, which is the first ultra-large rectangular shield machine used in metro parking line tunnel construction in China, designed to minimize the impact on surface buildings and traffic [1] - The project spans 48.3 kilometers with 19 stations, 15 of which are transfer stations, enhancing connectivity between the main urban area and the suburban regions of Linping and Xiaoshan [1] Group 2 - The Hangzhou Metro Line 9 Phase II, located in Linping District, is 10 kilometers long with 7 stations, currently progressing into the shield tunneling phase [2] - The Hangzhou Metro Line 15 Phase I, approximately 41 kilometers long with 30 stations, has also made significant progress, with key structural milestones achieved at various stations [2]

Group 1 - The construction of the second phase of Metro Line 9 in Hangzhou has made significant progress, with the completion of the main structure of the Kangxin Road Station and multiple station foundation excavations underway [1] - The second phase of Metro Line 9 runs underground in Linping District, with a total of 7 stations and no transfer stations, enhancing local transportation infrastructure [1] - The first phase of Metro Line 15 has also seen progress, with several stations entering the main foundation excavation phase, including successful condition acceptance for the foundation excavation at Jingfang Station [1] Group 2 - The first phase of Metro Line 18 is progressing well, featuring a north-south route that connects key areas and integrates with other rail services, with a total length of approximately 48 kilometers and 19 stations planned [2] - Significant milestones have been achieved in the construction of Metro Line 10's third phase, with the successful initiation of the fourth shield machine and the completion of the main structure at Renhe Station [2] - The construction of Metro Line 10 has reached a new phase with simultaneous excavation of multiple shield machines, indicating a major breakthrough in project development [2]