Located in Alishan Township of Chiayi County, the Tfuya Historic Trail (Old Railway of the Shuishan Line) is a branch line of the Dongpu Line of the Alishan Forest Railway in the past. The railway was completed in 1931, leading from Zhaoping to Eryu (Zizhong), and thereafter extending to Xingaokou. It is a railway built by the Government-General in Taiwan to develop the forest resources of Alishan during the Japanese occupation. Where the old Shuishan line meets Zizhong, there was a railway line branching out to the southwest. That is the current section of the Tfuya Historic Trail. However, the railway was abandoned in 1977. In 2001, the Chiayi Forestry Administration reorganized a part of the railway and made it the Tfuya Trail for tourists recreational hike.
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