There is a plan to extend the line north to Hunei District[citation needed].

Together with the approval from relevant city councils, the metro department began conducting feasibility studies of the Red Line in February 1999.

Three months later, priority was given to China Steel Corporation and Siemens on construction contracts.

The entire line from Siaogang to Ciaotou stations opened on 9 March 2008, and was free to commuters until 7 April the same year.

[1] The new EMUs for the six expanded stations will be manufactured by South Korea's Hyundai Rotem and Singapore's ST Engineering.