Original: The Jikji was written by the Buddhist monk Baegun (1298-1374, Buddhist name Gyeonghan), who served as the chief priest of Anguk and Shingwang temples in Haeju, and was published in two volumes in Seongbulsan in 1372.
Simplified: It was written by the Buddhist monk Baegun who died three years before this edition was printed. Baegun was the chief priest of the Anguk and Shingwang temples in Haeju.