Beijing subway：Line＃6 and Line＃10

北京地铁10号线是北京地铁继2号线以后的第二条环线，全线位于三环路至四环路间，全长57.1千米，全部为地下线，设站45座。线路贯穿海淀区、朝阳区、丰台区三个行政区，连接中关村、学院路、CBD、公主坟等商务区和商业区，宋家庄等五个交通枢纽，以及万柳、草桥和世纪城等居住区，是目前北京地铁系统中最繁忙的线路。线路标志色为淡蓝色。线路分两期建设，一期为北段和东段，由巴沟站至劲松站，于2008年7月开通；二期为南段和西段，于2013年5月5日开通，至此10号线成为一条完整的环线。Line ＃10?of the?Beijing Subway?(Chinese:?北京地铁10号线) is the second?loop line?in?Beijing's?rapid transit?network as well as the longest and most widely used line. The line is 57.1?km in length and runs entirely underground through?Haidian,?Chaoyang?and?Fengtai?Districts, either directly underneath or just beyond the?3rd Ring Road.?The Line ＃10 loop is situated between two and six kilometers outside of the?Line ＃2?loop, which circumnavigates?Beijing's old city. Every subway line through the city centre intersects with Line 10, which has 24 (currently 14 available) transfer stations along route, and 45 stations in all. Line ＃10's color is??????Capri.Line ＃10 is the world's longest subway loop line and one of the longest entirely underground subway lines req