 The first phase of the system, including Line 1 and Line 2, was approved by National Development and Reform Commission (NDRC) in February 2009.Construction of Line 1 started on 6 June 2009 and Line 2 started construction on 28 December 2010.As planned, Line 1 and Line 2 commenced operations on 26 December 2013 and 19 August 2016 respectively.