In addition, during the North Korean invasion, Dongwangsansan Fortress in Suwon was located, and a strong position was built, but the army was engaged in a war of land and a war of guerrilla fighters. In 1593, he divided his forces and ordered SeonguI, the deputy commander, to take the army to the Kimchusan Mountain, and then cross the Han River with 2,800 soldiers. He was dismissed for summary disposal of a police sergeant after earning his degree in the field, but was re-appointed as a judge of the Han family and was appointed as a police officer in 1596. When Jeong Yu-jaran broke out in 1597, he was forced to leave Ulsan with the emperor of Ming to block the enemy's north, but suddenly he retired as the commander of the Ming Dynasty.