Dispute
Lee 's lip was found in the Chosun dynasty as a man made sulfur. When sulfur and cast iron were not produced in Korea, they devoted their lives to finding it. In January 1657, when he was 38 years old, he found cast iron in Dalian, Dalchon, an agricultural village. Two years later he learned how to dissolve cobbles. In the following year, he made 280 inscriptions, 100 rocks, 1000 rocks, 100 watercolors, 73,000 lenticular rocks, and 440 rocks. So, Chosun, Hyun Jong gave him the post of the comrades. He also discovered sulfur and learned how to make sulfur and used it as a medicinal product. Because of this big rivalry in the country, Chosun Sukjong increased his kingship in his third generation and handed over the Dalcheon mine. Lee, who was the owner of the Dalcheon mine, was responsible for the development and maintenance of the Daejong line. The 13th generation man managed the mine until the Treaty of Korea and Japan in 1910. He left the book of 12 volumes.