The first inclusion of Balhae in Korean history was in the Jewang ungi, a historical book written in the form of rhyming poetry by Goryeo scholar and court official Lee Seung-hyu in 1287, during the late Goryeo dynasty. According to Myungkyung University Professor Lee Sooyoung, Lee was motivated to write the Jewangungi due to both the internal political turmoil of the Goryeo court as well as the Yuan dynasty's interference in Goryeo politics during Goryeo under Mongol rule. The Jewangungi is considered important as it is the first history book to record the history of Balhae as Korean history, and has been cited by both North and South Korean scholars.
