北京这条地铁线启动建设，设5座车站两站换乘

Core Viewpoint - The completion of the eastern section of Line 3 will enhance connectivity and alleviate traffic pressure in the eastern districts of the city, contributing to the overall efficiency of the urban transport network [7]. Group 1: Project Overview - The eastern section of Line 3, which includes five new stations, will connect the existing Line 3 from Dongsi Shoutiao to Dongba North Station, achieving full line operation [2]. - The total length of Line 3 after the completion of the eastern section will reach 19.7 kilometers, establishing it as a major east-west transit line [7]. Group 2: Station Details - The Guanzhuang Road West Station will serve as an interchange with the R4 line, facilitating transfers for residents from Shunyi to the city center [4][5]. - The construction of the new stations, including Guanzhuang Road West, will provide future connectivity options, such as a potential transfer to the M101 line at Gaoxinzhuang Station [4]. Group 3: Impact on Transportation - The new section is expected to significantly ease traffic congestion in the Dongba area and strengthen the connection between the central city and its sub-centers [7]. - The project will directly benefit key functional areas like the Jinzhan International Cooperation Service Zone, improving travel convenience for residents in the Dongba and Jinzhan regions [7].