The trail entrance that starts from Benggui is located in Yuchi Township, Nantou County. There are signs indicating the Tudigong Saddle along the road.
This Shuishalian Historic Trail, which spans across Puli Township in the north and Shuili Township in the south, is located in Nantou County and has a total length of about 29 km. The date of construction is unknown and today the only section left from the trail is from Shuili to Gungui via Erping. The trail is also known as the Tudigong Anling Trail because there is a Tudigong Temple on the ridge saddle.
Since the Qing period, the Shuishalian Historic Trail has been an important route for Han people to enter the Toushe Basin, Puli Basin, and Sun Moon Lake Shuishe. Due to migration and trade needs, the Han immigrants, Pingpu group and indigenous groups actively used this trail. In the early days of the Japanese occupation period, the Shuishalian Historic Trail was regarded as an important barrier defense line, and set up policing stations.
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