Jeong Yakyong, also known as Dasan, was a prominent Korean scholar and philosopher during the late Joseon Dynasty. Born in 1762, he is best known for his contributions to Confucian thought and his efforts to reform Korean society through education and practical governance. His works emphasized the importance of moral integrity and the application of knowledge to improve the lives of ordinary people. In addition to his philosophical writings, Jeong Yakyong was an accomplished scientist and inventor. He developed various agricultural techniques and tools, which helped enhance productivity in farming. His legacy continues to influence Korean intellectual thought and is celebrated for promoting rationalism and practical knowledge in a time of rigid traditionalism.