It's very humble-looking and way out of Magong, but if you're touring Xiyu, this place is well known for its seafood.
The fish sashimi and fresh Penghu oysters (from NT$260) are specialities, but more basic dishes like pumpkin noodles are also available. In peak season it can get very busy and at any time the big table layout can make it feel a little uncomfortable for individuals wanting anything less than a feast. The restaurant is around 1km from Erkan, west of Rte 203 towards Chixi fishing harbour.