In Qitou Village, you can still experience Baodun, a traditional fishing practice in Penghu. "Dun" refers to open stone stacks constructed with local corncob stones on the intertidal zone. They are commonly called "fish houses." Fishermen use these structures together with tides for fishing. During high tide, bottom-dwelling fish swim into these stone stacks, and when the tide recedes, fishermen dismantle the structures and catch the fish with nets. Traditional Baodun fishing grounds in Penghu mainly exist on the northern intertidal zones of白沙 Township, with the largest areas being at Chikan and Qitou. The reef of Qitou contains more than 300 stone stacks in total. Each stack is arranged according to shape and size requirements with different numbers of stones. Construction usually begins in spring when sargassum grows, as the sargassum attracts small sea breams to feed near the stacks closer to the shore. After June the sea bream migrate offshore, making the stone stacks inefficient for use. The fisherman then dismantle the stacks, a process known as "san dun." They rebuild the stacks in the following spring, which is called "jian dun." Main catches include玳瑁石斑 (turtleskin groupers),笛鯛 (笛鯛), and马拉巴石斑 (Malabar groupers) among other products.