 In 1564 the 19th year of Myeongjong, he passed the "Samasi" examination, and in 1566 he passed the "Mun-gwa" at a special examination, and then took the post of "Gwonji bujeongja" (권지부정사, 權知副正字).He held various other positions and in 1569 he joined the imperial birthday mission to Ming as a "Seojanggwan" (서장관, 書狀官), returning to Korea the following year.Thereafter he held posts including Inspector of Classics (경연검토관, 經筵檢討官) and devoted himself to editing, being granted a royal sabbatical (사가독서, 賜暇讀書).