Dongyin Township (Tungyin) is an insular rural township which is part of Lienchiang County, Fujian Province, Republic of China (Taiwan). The islands are in the East China Sea off the coast of Fujian Province, China near the cities of Fuzhou (Foochow) and Ningde. The township is known for its natural environment and Eastern Min culture, for the historical Dongyong Lighthouse and for its military importance and history as the northernmost territory of Taiwan.

Fuchien Province, also romanized as Fujian and rendered as Fukien, is a nominal province of the Republic of China without formal administrative function. It includes three small archipelagos off the coast of the Fujian Province of the People's Republic of China, namely the Matsu Islands, which make up Lienchiang County, and the Wuqiu Islands and Kinmen Islands, which make up Kinmen County. The seat of the administrative centre is Jincheng Township of Kinmen County which serves as its de facto capital. The province is also known as the Golden Horse, after the literal reading of the Chinese character abbreviation for "Kinmen-Matsu".