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北京地铁4号线已经开通运营,作为京城西部一条纵贯南北的轨道交通线,4号线跨越丰台、宣武、西城、海淀4个行政区,整个线路商圈分布密集,
Beijing Metro Line 4 has been opened and operated as a north-south rail transit line in the western part of Beijing. Line 4 crosses Fengtai, Xuanwu, Xicheng and Haidian districts. The entire shopping district is densely distributed,