Leading river traces regularly on my Meetup or Instagram 12 seasons a year.
The entrance is called "Butterfly Valley(蝴蝶谷)", a natural water park for the local. Fun for swimming, picnicking and BBQ. Recently visitors have significantly risen, especially on holidays. At the end of the river trace is there a waterfall with its big pool. On my way to it I saw wild boars and deer. The water is beautiful and the valley is very ... ideal for camping. The river trace is easy.
Very easy and accessible in dry seasons. Good hot springs but be careful of falling rocks. Don't camp right at the mountainfoot, which is prone to falling rocks.
Trees, water and mountains are emerald green. Many pools in this river. I traced the right fork which has most fun. The mainstream is boring, thus not worthy going. There is a 2M slope in the middle (24.90268,121.77072) that you either need to booast up with your teammate or pull yourself up on the pipe to get over.