2.5 hours to the final waterfalls.
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Helmets and river tracing boots.
The first waterfall is at 24.96,121.9085. It's 4 meters and has a nice pool to chill. On top of it are another two pools and you can jump into them. Trace further up for another 40 minutes-1 hour and you'll get to a 8-m waterfall. If you go above the 8-meter waterfall, two really tall waterfalls are around the corner. The one on the main stream is around 20-25 meters tall, and the other one on the left fork is also around that height. We went around the waterfall on the right side(facing downstream) and did a little bushwhack, but it was quite easy in general. There's webbing and a rope on the other side but it looked very sketchy to climb up, so we didn't go up on the left side(facing downstream). Shimen Creek is not only easy but also quite traffically available, just a train ride and a taxi from Dali 大里 or Daxi 大溪 station and you'll get to the trailhead.