Jeong Yak-yong: The Poet of Practical Learning Jeong Yak-yong (丁若鏞, 1762 – 1836), affectionately known as Dasan (茶山), was more than just a poet; he embodied the spirit of Silhak (實學)—Korea’s late Joseon School of Practical Learning—a movement dedicated to reconciling Confucian ethics with scientific observation and pragmatic governance. His legacy extends far beyond his lyrical verses, establishing him as one of the most influential t…