The single-line subway network first opened in 2006 with 12 stations.

[citation needed] After the city's administrative district was expanded in 1995, plans were announced in February 1996 for a five-line metro service totaling 102.3 kilometres (63.6 mi).

Construction of Line 1 began in October 1996 and was scheduled to be completed by 2003, but completion was delayed by right-of-way acquisition and constrained finances in the wake of the 1997 Asian financial crisis.

[2] Line 1 was initially designed to be 22.6 kilometres (14.0 mi) long, connecting the old and new town centers.

[4] In 2015, a basic plan was established and the following year they announced the route, which included two demonstration routes that would later be connected, one in an urban area and one in a business area.