It will run from Dingpu Station on the Bannan line along Zhongyang Road to Sanxia and then cross National Freeway No.

As leader of the consortium, Hitachi Rail STS's scope of work included the supply of train control technology and all the electromechanical systems for an equivalent value of €219.8 million (VAT excluded).

[3] The main project started construction on 21 July 2016 and is expected to be completed and opened to the public by 2025.

As of the middle of February 2025, construction is 81.2% complete according to the Department of Rapid Transit Systems, New Taipei City Government.

[4] In August 2017, residents of Sanxia District protested against the planned station at Mazutian, citing controversy over land usage.