Its territory includes several islands to the south: Wollaedo (Korean: 월내도), Ojakdo (오작도), and Yukdo (육도).

[9] The church was visited and supported by English, Scottish, and American Presbyterian missionaries in the following years, including Horace Underwood.

In 1952, a group of "White Tiger" partisans working together with United States Special Forces landed on the cape.

[12][13] It has been reported by a former North Korean army officer that areas of the coast in Ryongyŏn are still defended by land mines.

[15] Western aid organizations have supported a Ryongyŏn Sustainable Food Security Programme to bring about "environmentally friendly community development at a group of four collective farms covering over 7,000 acres.

"[16] At an international conference on plans for a proposed Korea-China undersea tunnel, held in Seoul in 2008, Changsan was one of the locations considered for the terminus on the Korean side.