Cihu is the result of a joint military/civil engineering project. Located near the Guningtou (Kuningtou) battlefield, it provides 120 hectares of fish-farming area for local residents and has a long dike that constitutes an obstacle to enemy landings as well. This is Kinmen's foremost bird watching area, with flocks of cormorants-which are rarely seen in Taiwan-frequently visiting. Nearly 200 species of birds have been sighted here, with birds of the Scoloipacidae family being most numerous.