Definition of "Dadan"

Mainland China and Taiwan do not border each other by land; they face each other across a 140-km-wide ocean strait. Taiwan-held Dadan Island sits 2 km away from Xiamen. Xiamenese can use binoculars to observe their kinfolk on Dadan Island, with whom they have traditionally intermarried (Mellor, 1993).

2005, Xiangming Chen, “The Greater Southeast China Subregion”, in As Borders Bend: Transnational Spaces on the Pacific Rim‎, Rowman & Littlefield, pages 91–92

Jinmen, known historically as Quemoy, has had some success building a tourist industry on the back of its even closer link to the mainland, close enough that Taiwanese defectors were said to have swum from there to the Chinese city of Xiamen. The military is also in the process of handing over to civilian control other islands that are now restricted zones, including small islets named Erdan and Dadan.

2013 June 3, Sarah Mishkin, “Taiwan’s small islands turn to tourism to stay afloat”, in Financial Times‎, archived from the original on 28 April 2022, Asia-Pacific‎

Visits to Dadan, a Taiwan-held island off the coast of China and a major battleground during the Cold War, proved an instant hit following the start of tour bookings earlier this week.

2019 February 16, “Tours to Dadan Island prove a big hit with Taiwanese”, in Focus Taiwan‎, archived from the original on 20 June 2022, Society‎