A 2 ft 6 in (762 mm) gauge line on the east coast was regauged to 3 ft 6 in (1,067 mm) when it was interconnected. A 2 ft 6 in (762 mm), narrow-gauge Alishan Forest Railway stretches 72 kilometres and connects Chiayi to the mountain resort of Alishan. The line is primarily a tourist attraction. On 7 September 2006, the Taiwanese government announced a plan to update to standard gauge. (https://en.wikipedia.org/wiki/Narrow-gauge_railways_in_Asia)