7月18日，中国铁建十四局的员工在北京地铁九号线5标段内施工。北京地铁9号线北段从北京西站至国家图书馆站，预计将于年内开通运营。北段开通后，将与2011年开通的南段（郭公庄—北京西站）贯通，未来与地铁6号线、1号线、10号线、4号线等线路换乘。新华社记者 邢广利 摄     July 18,，The China railway construction shisiju employees in Beijing metro line no. 9 5 construction within the contract。Beijing subway line 9 from Beijing west railway station north to the national library station，A successful operation is expected in years。After the opening section，With 2011 years of the opening of the will of the southern（Optimize-Beijing west station）breakthrough，The future and the metro line 6、Line 1、Line 10、Line 4 transfer lines, etc。The xinhua news agency XingGuangLi perturbation

    7月18日，中国铁建十四局的员工在北京地铁九号线5标段内施工。新华社记者 邢广利 摄     July 18,，The China railway construction shisiju employees in Beijing metro line no. 9 5 construction within the contract。The xinhua news agency XingGuangLi perturbation