Jeong In-ji was a Korean Neo-Confucian scholar, historian who served as Vice Minister of Education or Deputy Chief Scholar during the reign of King Sejong the Great, Minister of Rites during the reign of King Munjong and Danjong, Left or Second State Councillor from 1453 to 1455 during the reign of King Danjong, and Chief State Councillor from 1455 to 1458 during the reign of King Sejo. Wikipedia