A famous monk and writer in Korea's Koryo era was once honored as a national honor.

Yi Ran's surname is Jin, whose name is Ming and the word is dark, and his name is Mu An, a famous writer and historian. He became a monk at the age of nine and learned a lot. 1283, aged 78, was awarded "national honor". He made great contributions to the collection and collation of Korean historical legends and folk songs before the ninth century. The Five-volume Legacy of the Three Kingdoms, written in his later years, based on a large number of historical materials and legends, describes in detail the history of Goguryeo, Baekje and Silla and the spread of Buddhism, which has important documentary value and is one of the classic works of North Korea.