(pseudonym, O Wong). Born 1845; died 1899. Korean painter.
In the 1890’s, Chang Sung-op was a member of the Tohwaso, which served as an academy of painting in Seoul. He was a representative of the “birds-and-flowers” school and of the traditional Korean painting technique in india ink and watercolors. His works include Shepherd With Buffalo and Butterflies (Central Historical Museum, Pyongyang).