Late-Goryeo and early-Joseon official and diplomat to Ming China
| Life | 1341 ~ 1399 |
| Era | 고려·조선 |
| Clan | 경주 설씨 |
Seol Jang-su, eldest son of Seol Son, passed the civil examination in the early 1360s and is said to have made about eight missions to Ming China. He dealt with the Cheolryeong territorial question, obtained approval for Ming-style official dress, and took part in enthroning King Gongyang.
After Joseon was founded he was exiled as an associate of Jeong Mong-ju's faction and later released; in 1396 he received Gyerim (Gyeongju) as his seat and was made Lord of Yeonsanbu. He died in 1399 after a mission to Ming; sources give his posthumous name as Munjeong or Munryang. He is also credited with Jikhae Sohak. He belongs to the Uyghur-descended 偰 line.