The Hankyoreh Journalist. He received his doctorate in political science from the graduate school of Jeju National University for his comparative research on the Greek Civil War and Jeju 4·3. He has been a journalist since 1989. He is interested in identifying the relationship between Jeju 4·3 and the U.S. Major books include (2014), <4·3,Asking the United States>(2020). <4·3, 19470301-19540921 Long silence out>(2023). Japanese colonial era Mobilization of labor in Jeju area and Jeju 4.3 Participated in a number of oral works for experienced people.