Sinan County (Sinan-gun) is a county in South Jeolla Province, South Korea. The county consists of 111 inhabited islands and 719 uninhabited islands. The number of islands in this county accounts for 25% of all islands in South Korea. Big islands among them are Anjwado (45.2㎢), Aphaedo (44.3㎢), Bigeumdo (43.1㎢), Dochodo (40.3㎢), Imjado (43.2㎢), Amtaedo (38.7㎢), Jeungdo (37.2㎢), Jangsando (24.3㎢), Haeuido (16.1㎢), and Heuksando (19.7㎢). The sea area is a continental shelf with less than 15 meter in depth. Sinan County is known for its specialities - Skate (fish) and Cheonilyeom(천일염). Cheonilyeom is a kind of salt. However, some salt farm workers had beaten, exploited and not paid their labours.