北京这三条地铁新线完成建设，即将开通

Core Viewpoint - Beijing's subway system is set to expand with the completion of three new lines, enhancing the overall transportation network and increasing the total operational mileage to 909 kilometers. Group 1: New Subway Lines - The 17th line (Worker's Stadium to Shilihe) and the southern extension of the 6th line are ready for initial operation, along with the 18th line, which is part of the 13th line expansion project [1][4]. - The total length of the new lines is approximately 30.1 kilometers, with all necessary operational tasks completed [1][14]. Group 2: Key Stations and Features - The 18th line features 11 stations, all of which are ready for operation, including key transfer points at Malianwa Station (with Line 16), Huoying Station (with Line 8), Tiantongyuan Station (with Line 5), and Tiantongyuan East Station (with Line 17) [6][4]. - The Huoying Station on the 18th line is notable for being Beijing's first large-span column-free station, with a hall span of 18 meters, providing a spacious and clear transfer area [3]. Group 3: Operational Efficiency - The travel time on the 18th line from Tiantongyuan East Station to Malianwa Station is approximately 30 minutes [4]. - The 17th line's mid-section, which will open this year, spans about 7.2 kilometers and includes four stations: Dongdachang Station, Yong'anli Station, Guangqumenwai Station, and Panjiayuan West Station [14].