The Pinglin District is at the upstream of Feitsui Reservoir, but every so often instances of fish electrocution and poisoning occurred at the site, seriously damaging the ecosystem and water resources. The year of 2002 saw the initiation of the river ecological restoration project, which had a great turnout! Now at the Fish Observation Trail, visitors can easily see a surprisingly large amount of onychostoma barbatula (a native species of fish in Taiwan) in the water. But don't try to jump in to play with the fish as the trail is open for observation only.