The Matsu Islands, officially Lienchiang County, are an archipelago of 36 islands and islets in the East China Sea governed by the Republic of China, situated alongside the southeastern coast of mainland China. The archipelago forms the smallest county in the ROC-controlled territories by area and population, as well as one of two counties that is a part of th…The Matsu Islands, officially Lienchiang County, are an archipelago of 36 islands and islets in the East China Sea governed by the Republic of China, situated alongside the southeastern coast of mainland China. The archipelago forms the smallest county in the ROC-controlled territories by area and population, as well as one of two counties that is a part of the nominal Fuchien Province.