Group 1 - The core issue is the delay in the opening of the Wangjing West Station of the subway line 17, which is causing inconvenience for commuters who need to transfer to reach the Future Science City [3][4] - The Wangjing West Station has two entrances, but one is not operational due to the slow progress of the associated transportation hub construction, which is affecting the station's opening conditions [3][4] - The transportation hub was completed on June 30 of the previous year, but it has not opened due to issues with fire safety inspections related to the existing transfer passages for lines 13 and 15 [4][5] Group 2 - The construction of the underground transfer hall at Wangjing West Station is progressing slowly, which is intended to replace the existing transfer passage that has been criticized for its long walking time [4][5] - The complexity of the surrounding environment, including proximity to existing operational lines and high-pressure gas facilities, is contributing to the construction difficulties [5] - Relevant departments are actively coordinating to expedite the opening of the transportation hub and the associated subway station facilities [5]

Core Viewpoint - The Beijing Metro Line 18, derived from the ongoing expansion of Line 13, is crucial for connecting northern Haidian and the Changping "Huitian area," and it has begun a trial operation phase lasting at least three months to prepare for its expected operational launch by the end of the year [1][3]. Group 1: Project Overview - The Line 18 connects major residential areas in northern Haidian, the Zhongguancun Software Park, and the Changping "Huitian area," serving as a key east-west route in northern Beijing [1]. - The trial operation phase includes comprehensive testing and calibration of vehicles, power supply, signaling, and communication systems, ensuring all components work seamlessly together [1][3]. Group 2: Technical Specifications - The trial operation utilizes the lightest metro train in Beijing, a 4-carriage, 2-drag, 6B configuration, with a maximum passenger capacity of 2,016 and a top speed of 80 km/h [3]. - The new trains are approximately 12 tons lighter than those on the existing Line 13, significantly reducing energy consumption [3]. - Enhanced passenger comfort is provided with a 10 cm higher ceiling in the carriages compared to the current Line 13 trains, accommodating taller individuals better [3]. Group 3: Additional Features - The new trains are equipped with carbon fiber electric heating seats, offering increased warmth and comfort during winter rides [5].