Yi Yunsaeng (1604-1637) is a descendant of the Bupyeong Yi family that resided in Incheon. He was very talented at archery and has very good horsemanship. He was appointed to Chungmuwuibusagwa. When the war against Ching started in 1636, Yi Yunsaeng recruited volunteer troops and gathered at Won-do (Nak Island). He blocked the path from Ganghwa Island to Namhansansung (Namhan Mt. Fortress) and fought off the Ching army on Jan. 24. The following day, Jan. 25, Yi Yunsaeng and the volunteer troops fought against the attack of Ching's army. During the course of the battle, Yi Yunsaeng and his troops ran out of arrows, resulting to the collapse of the fort and Yi Yunsaeng's death during the battle.
After news of his death was delivered to his wife (Lady Gang), she fell into the sea and killed herself to follow her husband. On April 13, 1861, during the 12th year of King Cheoljong's reign, Jeongryeo (a gate of honor) was posthumously given to them. Yi Yunsaeng was promoted to a high-ranking official. and his wife was granted the Lady Gang.
Currently, the Jeongryeo gates are located at Yonghyeon-dong. Two tablets hang side by side at the Jeongryeo gates for both Mr. and Mrs. Yi Yunsaeng, and their contents are as follows: [The Commendatory Gate with this inscription is built here by the King's order for Yi Yunsaeng, a loyal subject, who was granted the Official Title of Tongjeongdaebu, Left- Seungji of Seungjeung-won and Gyeongyeon-Chamchan-gwan, on one day of Sinyu year during King Cheoljong's reign], [The Commendatory Gate with this inscription is built here by the King's order for Geumcheon Gang ssi, the faithful wife of Yi Yunsaeng, who was granted the Title of Sukbuin, a Noble Lady, on one day of Sinyu year during King Cheoljong's reign].