Core Points - The Beijing Subway Line 8's Dahongmen Station officially opened on November 8, enabling bidirectional transfer with Line 10, marking the full connectivity of this north-south "underground central axis" line [1][2] Group 1: Infrastructure and Connectivity - Beijing Subway Line 8 is a key line in the city's rail transit network, stretching from Zhuxinzhuang Station in Changping District to Yinhai Station in Daxing District, with a total of 35 stations [2] - The line passes through significant areas such as Olympic Park, Shichahai, Qianmen, and Tianqiao, aligning closely with the city's central axis [2] - The opening of Dahongmen Station resolves the operational bottleneck of transferring to Line 10, providing efficient travel options for passengers between central Beijing and southern districts like Fengtai and Daxing [2] Group 2: Service Enhancements - The station features clear directional signage, a well-organized ticket gate layout, and comprehensive customer service and accessibility facilities, indicating an upgrade in operational services [4] - Initial operations include a "Light Up New Coordinates" event, offering exclusive service desks and free postcards as souvenirs for passengers [4] - Currently, three additional subway lines (Line 17 mid-section, Line 6 south extension, and Line 18) are undergoing closed-loop simulation operations, with plans to exceed 900 kilometers of operational rail transit upon their opening [4]

Core Points - Beijing's subway line 18 officially began trial operations on October 25, marking the completion of the "running map" phase for three new subway lines planned for this year [1] - The total length of the three new subway lines is approximately 30.1 kilometers, contributing to a total operational subway mileage in Beijing exceeding 900 kilometers [1] Summary by Sections Line 18 - Line 18, running from Malianwa to Tiantongyuan East, is a key east-west line in northern Beijing, spanning approximately 19.8 kilometers with 11 stations, including 4 transfer stations [1] - This line is expected to support the development of the northern region of Beijing [1] Line 6 South Extension - The south extension of Line 6 is about 2.1 kilometers long, starting from Lucheng Station and extending to Luyang Station, playing a crucial role in the urban sub-center's transit network [1] Line 17 - Line 17 serves as a major north-south transit line, connecting residential areas such as Tiantongyuan, Wangjing West, and others [1] - The middle section of Line 17, approximately 8.2 kilometers long with 4 stations, will complete the line's connectivity, following the opening of its southern and northern segments in 2021 and 2023, respectively [1]

Core Points - Beijing's subway system has entered the "test run" phase for three new lines, including Line 18, which is expected to enhance the city's transportation network significantly [1][5] - The completion of these lines will increase the total operational mileage of Beijing's subway to over 900 kilometers, improving network layout and transport capacity [1][5] Group 1: Line 18 Overview - Line 18 (Malianwa to Tiantongyuan East) is a key east-west line in the northern part of the city, spanning approximately 19.8 kilometers with 11 stations, including 4 transfer stations [2] - The line aims to support the development of northern areas and alleviate traffic pressure in the region, particularly for large residential areas like Tiantongyuan and Huoying [2] Group 2: Line 17 Overview - Line 17 is a major north-south line connecting various residential areas, with the middle section (about 8.2 kilometers) set to complete the line's connectivity [2] - Once fully operational, the line will allow for a 66-minute travel time from Jiayue Lake to Future Science City North, improving passenger flow management and easing surrounding traffic congestion [2] Group 3: Line 6 South Extension Overview - The south extension of Line 6 is approximately 2.1 kilometers long and is crucial for enhancing the transportation infrastructure in the city's sub-center [3] - This extension is part of the broader plan to improve public transport and promote green travel options [3] Group 4: Technological Innovations - Line 18 is notable for being the first in the country to use carbon fiber electric heating seats and features a fully standardized, intelligent, and mechanized construction approach [3] - The line also employs flexible direct current traction supply technology, marking a significant advancement in subway technology [3] Group 5: Construction and Operational Testing - The three lines will undergo a minimum of 30 days of closed-loop testing to evaluate key performance indicators such as punctuality and equipment failure rates [5] - Following successful evaluations and safety assessments, the lines will be ready for public operation, contributing to the city's public transport development [5]