Core Viewpoint - The Ningbo Metro Line 7, constructed by China Railway Sixth Group's transportation division, has officially commenced operations, bringing the total operational mileage of Ningbo's metro system to 262 kilometers [2]. Group 1: Project Overview - Ningbo Metro Line 7 has a total length of 39.4 kilometers, entirely underground, with 25 stations starting from Yinzhou Yunlong and ending at Zhenhai Yufan [2]. - The line connects several key areas including Qiuai, Eastern New Town, Sanjiangkou, Old Bund, Wantou, Zhuangqiao, and Zhenhai New Town [2]. Group 2: Technical Challenges and Solutions - The project faced significant technical challenges due to Ningbo's soft soil, abundant groundwater, and complex geological conditions [2]. - The project team emphasized the construction of a structural self-waterproofing system, utilizing reinforced concrete as the primary method, supplemented by a flexible full-package waterproof layer for enhanced protection [2]. Group 3: Quality Control Measures - The project implemented a strict "three-inspection system" and "sample-based guidance" to ensure quality control throughout the construction process [2]. - Automated monitoring equipment was introduced to continuously track structural deformation, surrounding building settlement, and groundwater level changes, with real-time data uploaded to a smart construction platform for early risk detection and management [2]. Group 4: Noise Control Measures - Special funds were allocated for the procurement of low-noise equipment, and soundproof covers were installed on high-noise machinery [2]. - During nighttime construction, high-noise operations were strictly limited, and hydraulic breakers were used instead of traditional blasting to keep noise levels below 55 decibels, minimizing the impact on nearby residents [2].

Core Viewpoint - The opening of Ningbo Metro Line 7 significantly enhances urban transportation connectivity and supports regional development, with a total operational mileage of 262 kilometers for the Ningbo rail transit network [2][3]. Group 1: Project Overview - Ningbo Metro Line 7 spans approximately 39.4 kilometers, entirely underground, with 25 stations connecting key areas such as Yinzhou, Jiangbei, and Zhenhai [2]. - The line aims to improve traffic integration between different districts, thereby enhancing the city's overall competitiveness and facilitating regional development [2]. Group 2: Benefits and Innovations - The new line is expected to save commuters an average of 20 minutes in travel time, improving daily convenience for residents [2]. - Multiple stations on Line 7 utilize prefabricated assembly methods, which reduce construction time by about 40% and lower energy consumption, aligning with environmental sustainability goals [2]. Group 3: Integration with Other Transport Modes - The project includes the addition and optimization of 28 bus stops and transfer facilities, effectively addressing the "last mile" issue for citizens [3]. - A multi-layered, barrier-free transfer system is being established, integrating metro, bus, shared bicycles, and ride-hailing services for all-weather convenience [3]. Group 4: Future Developments - The opening of Line 7 is part of a broader strategy to alleviate traffic pressure in Ningbo and promote urban industrial upgrades through models like "metro + culture" and "metro + commerce" [3]. - Future plans include further enhancements to the rail transit network, aiming for a greener, more efficient, and smarter urban transportation system [3].

Core Points - Ningbo Metro Line 7 officially opened on August 29, covering a total length of 39.4 kilometers and connecting key areas such as Zhenhai New Town and Dongbu New Town [1][3] - The opening of Line 7 increases the total operational mileage of Ningbo Metro to over 262 kilometers, enhancing the city's transportation network [1][3] - The line features 25 underground stations and integrates with existing lines (1-5) and the under-construction Line 6, as well as regional railways, creating a comprehensive transportation system [3] Company Involvement - China Railway 10th Bureau played a significant role in the construction of Line 7, specifically in the power supply system for 10 stations and 11 sections [3] - The project faced high construction difficulty and safety risks, but the team successfully implemented an innovative construction model to ensure timely completion of electrical systems [3] Future Developments - The opening of Line 7 is expected to enhance Ningbo's service capacity in public transportation and support the development of major strategic platforms like Ningbo West Hub and Qianwan New Area [3] - Ningbo plans to continue advancing its metro construction, aiming to establish a modern transportation system that connects the city center, surrounding areas, and the Yangtze River Delta [3]