aboard. From 1939 to 1950, opium poppy planting and the manufacture and sale of opium was an economic mainstay for the islanders. In the wake of the surrender of Japan in Autumn 1945, representatives of Siapu County, Changlo County and Lienchiang County visited Dongyin (Tungyung) and contested control of the islands between their counties. The provincial government determined that Dongyin (Tungyung) was part of Lienchiang County. On February 19, 1955, Nationalist planes mistakenly bombed the island, causing the death of an elderly woman and some property damage. On July 16, 1956, the township was assigned to Lienchiang County. In 1958, the lighthouse temporarily stopped operation due to military concerns. On May 7, 1963, President Chiang Kai-shek visited the township. On the morning of May 1, 1965, the Battle of Dong-Yin occurred in the waters north of the township. On April 13 and August 22, 1979, and May 2, July 18, and September 29, 1980, President Chiang Ching-kuo visited the township. Construction of the Dongyong Reservoir () began in 1982 and was completed in 1985. On May 21, 1985, an attempt by Chinese Communist forces to collect information about Dongyin (Tungyin) by using the hijacked Taiwanese boat Hungchi No 1 () was stopped. On September 19, 1988, and August 10, 1990, President Lee Teng-hui visited the township. In 1989, the lighthouse resumed operation. On August 9, 2005, and February 5, 2008, President Chen Shui-bian visited the township. On June 19, 2010, President Ma Ying-jeou visited the township. On June 24, 2014, the wreckage of the SS Sobraon was found. In late April 2019, representatives from the Dongyin Township government visited nearby Haidao Township (PRC). On December 9, 2020, a ceremony was held marking the beginning of the rebuilding of the township government office and parking area. Geography Dongyin Township is an archipelago in the East China Sea off the PRC-administered Loyuan Bay (; Lò̤-nguòng-uăng) and is approximately from Keelung on Taiwan, with a total area of 4.4 km2. The east coast of Shi Wei Mountain () on Dongyin is the easternmost of the Matsu Islands (26。 23’ 08’’N, 120。 30’ 08’’ E), while the north coast of Beigu Reef (北固礁) on Xiyin (Siyin) is the northernmost of the Matsu Islands. Dongyin itself is the northernmost point of the territory of the Republic of China (Taiwan). The islands are the key transportation hub between Mawei and Shanghai, and are of strategic importance