After King Sejong's reign, Korean society experienced several significant changes and developments

After King Sejong's reign, Korean society experienced several significant changes and developments, many of which were influenced by his contributions. Some of his most notable contributions include: 1. Creation of Hangul: King Sejong is best known for the creation of Hangul, the Korean alphabet. Before Hangul, Korean people used Classical Chinese characters, which were difficult for commoners to learn and use. Hangul's introduction made it easier for the general population to become literate, promoting education and communication throughout the country. 2. Scientific advancements: King Sejong's reign saw numerous scientific advancements, including the development of advanced astronomical instruments, the creation of a rain gauge, and the establishment of a royal observatory. These innovations helped improve agriculture, navigation, and the understanding of natural phenomena. 3. Legal and administrative reforms: King Sejong implemented various legal and administrative reforms, such as the establishment of the Hall of Worthies (Jiphyeonjeon), a royal research institute. He also revised the law codes and streamlined the bureaucracy, making the government more efficient and fair. 4. Military improvements: King Sejong strengthened Korea's military by developing new weapons, such as the "Hwacha" (a multiple rocket launcher), and reorganizing the military structure. These improvements helped Korea defend itself against external threats, particularly from Japanese pirates. 5. Cultural achievements: King Sejong's reign was a golden age for Korean culture, with the flourishing of literature, music, and art. He supported the creation of various literary works, including historical records, encyclopedias, and medical texts, which contributed to the preservation and development of Korean culture. These contributions by King Sejong had a lasting impact on Korean society, shaping its future development in various aspects, such as education, science, governance, military, and culture.