The plan of Zhengzhou Subway line No. 1 as well as Zhengzhou Subway line No. 2, recently have been approved by National Development and Reform Commission (NDRC) in Feb. 2009. Zhengzhou Subway, will be a rapid transit rail network that serves both the urban and suburban districts of Zhengzhou municipality. As planned, those two projects will start from 2009 and will be finished in 2013 and 2015 respectively. Also as referenced in the long term plan, there are another 4 lines pending approval, Line 3 and Line 4 will be under construction during 2015-2020 and will be in operation by 2020, project on Line 5 and Line 6 will begin since 2020.