Hsiyin

"Way up here," Kueffer pointed thirty miles further north of the Matsus, "are two more islands we hold but, technically, although they're administered from here, they aren't part of this complex." He tapped the names on the map: Tungyin and Hsiyin.

1962, DeWitt S. Copp, “The Mudcats”, in The Odd Day, William Morrow and Company, →LCCN, →OCLC, page 67

[…]and Hsiyin, together with a handful of uninhabited islets. Matsu's chain of islands form part of the offshore territory of Fukien province's Lienkiang county.

1985, 勝利之光, 新中國出版社, →ISSN, →OCLC, page 24, column 1

This northernmost outpost of the Matsu archipelago is a remote place that sees few visitors. The largest island in the township is Tungyin (dōngyǐn) and to the west of that is Hsiyin (xīyǐn). Between the two is a barely habitable rock called Chungchu Island (zhōngzhù dǎo).

1998, Robert Storey, “Islands of the Taiwan Straits”, in Taiwan (Lonely Planet), 4th edition, →ISBN, →OCLC, →OL, pages 323–324

The main island of the complex is Nankan, more commonly known as Mazu, from the name of the major port of the island. It is 114 nautical miles north-west of Keelung, the port city on the northern tip of Taiwan, and is the same distance north of the Jinmen Islands. Other major islands of the group are Peikan, Kaoteng, Tungyin, Hsiyin, Tungchu and Hsichu.

2000 May, Keyuan Zou, “Redefining the Legal I Status of the Taiwan Strait”, in The International Journal of Marine and Coastal Law, volume 15, number 2, →DOI, →ISSN, →OCLC, page 247