Wansan Lee Clan of Bonghwa is a descendant of Onnyeong-gun, the seventh son of King Taejong. It is estimated that the descendants of Onnyeong-gun maintained a close relationship with Prince Suyang and did not oppose the rebellion of 1453. However, Lee Chong, the grandson of Onryeong-gun, was involved in the literati purge of 1498(Muosahwa), and all of his brothers were killed. They were called‘the seven great men(七公子)’. They were all promoted to the Jungjong Pavilion of 1506. After the Japanese Invasion of Korea in 1592, Lee Young-ki, a descendant of Usan-gun, married Andong Kwon Clan and entered Andong. Lee Young-ki's son, Lee Si-sun, grew up in a relatively stable environment and focused on studying, and after quitting the high-ranking management appointment test, interest in studying diversified. He wrote the scriptures himself, left notes on the Six Confucian Classics(六經), and compiled his writings to compile the scriptures, Summer Lotus Compilation(夏華編). The most representative of Lee Si-sun's writings was The collection of facts selected from historical books(歷代史選). The writings were excerpts from Chinese history. He became so interested in history because he was living in a time when the international order collapsed due to the Manchu Invasion. At that time, Joseon's intellectuals considered reforms to reorganize the collapsed social order, especially Namin, who expanded his academic field to scriptures such as the Six Confucian Classics, pointing out questions about Zhu Xi's interpretation of Confucian scriptures. Heo Mok was a representative Namin scholar who showed such an academic trend. This interest in Heo Mok's the Six Confucian Classics influenced the formation of the academic trend of the Namin. Heo Mok interacted directly or indirectly with Lee Hyun-il, Lee Yoo-jang, and Jeong Si-han, who were active in politics as Yeongnam Namin. By interacting with Namin in Yeongnam, Lee Si-sun laid the foundation for the Wansan Lee Clan in Bonghwa to grow into a representative royal family in Yeongnam.