Jiphyeonjeon expanded
Sejong turned the Hall of Worthies into a research institute whose scholars produced the Hunminjeongeum commentary and many other works.

De-Shao Liu ( Terry850324 ) · CC BY-SA 4.0 · Source
The Jiphyeonjeon had existed in name since Goryeo, but in 1420 Sejong set it up inside the palace and filled it with young scholars. They lectured the king and crown prince on the classics at royal seminars and researched past institutions to support policy. Sejong even gave them paid study leave (saga dokseo). The hall produced works such as the History of Goryeo and the Illustrated Guide to the Three Bonds, and Seong Sam-mun, Bak Paeng-nyeon, Sin Suk-ju and Jeong In-ji all worked there. Sejo abolished it in 1456 after the plot of the Six Martyred Ministers; under Seongjong its role passed to the Hongmungwan.

