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].

Group 1 - The recent announcement from Beijing's public resource trading service platform indicates that the construction of three new metro lines is in the preparatory phase, with bidding plans for temporary electricity supply expected to be released next month [1][5] - The first phase of Metro Line 3, which opened in December last year, will extend eastward beyond the currently operational section, adding approximately 6.4 kilometers and five new stations, facilitating interconnectivity with R4 and M101 lines [1][3] - The section from Dongba North Station to Gaoxin Zhuang Station on Line 3 will include four new stations, with the Dongba North Station serving as an interchange with Line R4 [3][5] Group 2 - Metro Line 12, which also opened in December last year, is set to extend from Dongba North Station to Dongba North Street Station, with the bidding plan for the 28th contract segment covering this extension [2][5] - The construction of the Northeast Ring Railway, specifically the segment from Guanghua Road to Beijing Chaoyang, has also announced a temporary electricity supply bidding plan, with the initial construction covering approximately 7 kilometers [6][8] - The bidding announcement for the Northeast Ring Railway is expected to be released on the 5th of next month [8]