The Shuishalian Historic Trail, which straddles Puli Township and Shuili Township of Nantou County, has an untestable date of construction. It starts from Shuili in the south and ends at Puli in the north with a total length of about 29 km. 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.
Today, the only section left from the trail is from Shuili to Gungui via Erping.
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