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Yoon Seon was built in the 5th year of King Seonjong of Korea. In China, before the 8th century, Yoon Seon is a power line that treads and turns aberrations. In the West, the paddle wheel boat, which had been practiced in 1543, was launched and tested in Korea in August, It was when Kim was a gyeongsang observer that he studied yoseonje of the \u0026 lt; college yearbook \u0026 gt; and entrusted design and construction to Kim Soon-goo. Upon successful completion of the test and voyage, Ahn Hyun asked him to use it. After that, Yoon was made to have two left and right wheels by Lee Min Soo, a descendant of Yi SunShin who was a descendant of Yi SunShin, when one of the four men stepped on it. But for whatever reason, it was not practiced. According to a study by Professor Sangyun Lee of Pukyong National University, Lee Yoon Seon, who was developed in the 5th year of King Seongjong in 1550, was later upgraded to Yongbuk with Changsun.