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黄封联络线处联接京沪线与沪昆线的一条联络线,由京沪线黄渡站引出至沪昆线封浜站结束。北京径由京沪线至沪昆线各站的列车,经此联络线运行,可绕开上海枢纽而直接到达沪昆线,大大缩短了列车运行时间。但因黄渡站是属于C-2区段车站,而黄封联络线其他各站都属于C-O区段站,如果这条联络线开行动车组,则就得在黄渡站进行人工切换,C-2至C-O切换得低于160km/h
Huang Feng contact line at the junction of the Beijing-Shanghai line and the Shanghai-Kunming line of a contact line from the Beijing-Shanghai Huangdu Station leads to Shanghai-Kunming line closure Haoban end. Beijing Trail from the Beijing-Shanghai line to Shanghai-Kunming line of the train station, the contact line operation, you can bypass the Shanghai hub and Shanghai-Kunming line directly, greatly reducing the train running time. However, because Huangdu Station belongs to the C-2 station and the other stations of the Huang-Feng Contact Line belong to the CO station, if this contact line is opened, the EMU will have to be switched manually at Huangdu Station. C -2 to CO to switch below 160km / h