As to Jancing Historic Trail, it was built on part of the old「Forest Railway- Jancing Line」 and the total length is 0.9 km.
The old「Forest Railway- Jancing Line」is about 5.5 km, it still retains the natural beauty and historical heritages along the railway as decades ago. Nowadays, you will see the railway tracks, wooden log cart and bogies on the trail, which can invoke the memory of old logging business.
A note on the naming choice. Generally speaking I try to use the Hanyu Pinyin system when writing trail names because it makes sense to have some order rather than none, but in this case, the majority of the official materials about the trail produced by Taipingshan National Park refers to it as Jancing Historic Trail, so that’s what I’ll stick with. Having said that, elsewhere (including on signs in the park itself) I have seen it called Jiancing Old Trail, Jianqing Huaigu Trail, and every possible permutation, so pick whichever name you like and use that.
https://www.funinfleet.com/yilan/154-yilan-jancing-historic-trail.html?layout=default&print=1&tmpl=component#sigProIdeaed362181