Haidao Township () is an insular township off the Asian mainland in Xiapu County, Ningde, Fujian, China (PRC). The township is immediately north of present-day Lienchiang County (the Matsu Islands), ROC (Taiwan).
On 15 December 1950, the Matsu Administrative Office () 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 (), Xiyang (), and Fuying () as well as Taishan () in present-day Shacheng, Fuding.
On 29 December 1950, the Daxiyang Island was attacked by Chinese Communist forces and defended by guerrilla forces.
On 27 July 1951, ten motorized with over four hundred Chinese Communist soldiers attacked Xiyang Island. More than sixty guerrilla soldiers defending the island died. Xiyang District () leader Li Kuei-Yu () and Sishuang District () leader Wang Chen-Chi () died in a grenade attack. The attacking force retreated.
In early July 1953, Chinese Nationalist guerillas retreated from islands in the Xiyang Island (Chihchutao) area. The area came under the control of Chinese Communists on 13 July 1953.
On 29 November 1954, Haidao District () was established.
In 1958, Haidao Commune () was established.
In 1984, Haidao Township () was established.
In August 2012, the Haidao Township, Xiapu County Uninhabited Island Environmental Protection Volunteer Service Unit (), forerunner of the Xiapu County Island Environmental Protection Organization (), was established.
In March 2016, a woman was murdered in Beishuang Village and two suspects were apprehended.
From 25 to 27 May 2018, the 2018 Xiapu, China Ocean Fishing Competition was held in the Sishuang islands.
In late April 2019, representatives from the nearby Dongyin Township's government (ROC) visited Haidao Township.
Islands in Haidao Township include:
Liang Island in Beigan Township, Lienchiang County (the Matsu Islands), ROC (Taiwan) is from Kuishan Island in the township. The Sishuang islands are north-northwest of Dongyin Township, Lienchiang County (the Matsu Islands), ROC (Taiwan).
Xiyang and Fuying Island are divided from mainland Asia by the Xiao'an Channel (Xiao'an Shuidao, Hsiao An Shui Tao; ).
Haidao Township includes six villages centered on three of the islands:
Xiyang Island:
Fuying Island:
Beishuang Island:
Most of the residents are involved in fishing-related work.