정철
However, the new Westerner government did not last for long. In 1590, the Easterners Yi San-hae and Yu Seong-ryong and the Westerner Jeong Cheol were the highest officials, the Jeongseung. At the time, Seonjo had not appointed a crown prince, although he was already nearing forty and had many sons, of whom the eldest was Prince Imhae. However, Imhae, in contrast to the younger Prince Gwanghae, was a well-known troublemaker, causing most of the