Heo Jun
But in 1999 Lee revolutionized the "sageuk" genre with "Hur Jun", the first Korean period drama to focus on a "commoner" historical figure instead of royalty and powerful nobles. Jun Kwang-ryul played Heo Jun, a court physician who wrote "Dongui Bogam", one of the pillars of traditional Korean medicine. "Hur Jun" reached record-breaking viewership ratings of 64% (fourth highest rated Korean drama of all time).