The second phase of Line 1 adds extensions at both ends of the initial 25.4km line, which opened in December 2013. The western extension from Xiliuhu to Henan University of Technology has seven stations, while the eastern extension from Zhengzhou Sports Centre to New Campus of Henan University includes three stations. The two extensions have a combined length of 15.4km.
The 42km, 14-station southern extension of Line 2 from Nansihuan to Xinsheng International Airport is known as the Suburban Line, reflecting the longer distance between stations.
The initial 25.2km section of Line 3 is due to open next year, followed by the 40.4km first phase of Line 5 in 2018.
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