Yi Se-bo, a cousin of King Cheoljong, was placed under a form of house arrest known as wiriancheo — confinement within a thorn-hedged enclosure — on Sinji Island, in Wando County, in 1860 (the 11th year of King Cheoljong's reign), after criticizing the corrupt hold on power of the Andong Kim clan, the dominant in-law family of the era. He remained in exile there until 1863 (the first year of King Gojong's reign), when he was released through the intervention of the Queen Dowager Jo and the Regent Heungseon Daewongun. The exile poems he composed during this period survive in a document known as the Sindo Illok (Record of Daily Life on Sindo).
Myeongsasibli also has an oral tradition combining the sound of its sand with an exile's longing for home. No documentary evidence confirms that the figure was Yi Se-bo or that an exile wrote poems on the beach and died there. Moreover, the character 鳴 means to sound or ring, so it cannot by itself prove that the name refers specifically to human weeping. Yi's documented exile and the beach tradition should be presented side by side, not merged into one historical fact.
The official tourism account says the sand's sound could be heard ten li away; it does not authenticate the death of a royal exile. Yi Se-bo's 1860–1863 exile and Sindo Illok belong to documentary history, while the beach story remains oral tradition. This edition does not assign individual poems to the beach without evidence or reduce the politics to one dramatic remark. The coordinate is the beach, not central Sinji-myeon. Sinji is road-accessible by bridge, but seasonal safety zones and parking change. Visitors may experience the soundscape without treating “weeping sand” as a scientific description.