Administrative Reforms under Joseon King Seongjong

Timeline

1. 1485Hanseong · Joseon dynastyIn the first month of Seongjong's sixteenth year, the Esa version of the Gyeongguk Daejeon was formally put into effect, establishing a centralized bureaucratic system with six ministries and a nine-rank, eighteen-grade official structure, becoming the fundamental law of the Joseon dynasty.
2. 1485–1487Hanseong · Joseon dynastySeongjong expanded the Office of Special Advisors, strengthened the remonstrance functions of the Office of the Inspector-General, the Office of Censors, and the Office of Special Advisors, employed Sarim Confucian scholars in government, regulated ruler-minister ethics through Confucian classics, and implemented measures such as the monk certification system to promote Confucianism and restrain Buddhism.