'township of the islands of the sea') is an insular township off the Asian mainland in Xiapu County, Ningde, Fujian, China (PRC).

[4] The township is immediately north of present-day Lienchiang County (the Matsu Islands), ROC (Taiwan).

[5] On December 15, 1950, the Matsu Administrative Office (馬祖行政公署) of Fujian Province, Republic of China was established including modern-day Lienchiang County (the Matsu Islands), ROC (Taiwan) as well as islands in present-day Haidao Township including the Sishuang Islands (四礵), Xiyang (西洋), and Fuying (浮鷹) as well as Taishan (台山) in present-day Shacheng, Fuding.

[8]: 460 On July 27, 1951, ten motorized with over four hundred Chinese Communist soldiers attacked Xiyang Island.

[2] In August 2012, the Haidao Township, Xiapu County Uninhabited Island Environmental Protection Volunteer Service Unit (霞浦县海岛乡无人岛屿环境保护志愿者服务队), forerunner of the Xiapu County Island Environmental Protection Organization (霞浦县岛屿环境保护协会), was established.