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1987年12月北京地下铁道复兴门折返线建成,实现了环线成环运营。地铁的客运量增长迅猛,日平均超过百万人次,地铁在城市公共交通中的作用日益充分显示出来,现已承担全市年客运量的10％(在此以前不到4％)。
In December 1987, Beijing Metro Fuxingmen return line was completed to achieve a loop operation. The rapid growth of the passenger traffic of the MTRC has a daily average of more than one million passengers. The role of the MTRC in urban public transport has become increasingly evident. It has now assumed 10% of the annual passenger traffic (less than 4% heretofore).