The Taichung line (Chinese: 臺中線 or 台中線; pinyin: Táizhōng Xiàn; Pe̍h-ōe-jī: Tâi-tiong Soàⁿ), also known as the Mountain line (Chinese: 山線; pinyin: Shān Xiàn; Pe̍h-ōe-jī: Soaⁿ-sòaⁿ), is a line of the Taiwan Railway. It is one of two parallel lines in Central Taiwan, passing the inland area and Downtown Taichung. It has a total length of 85.5 km (53.1 mi), all of which is double track.[1]