Korean History › Goryeo › Goryeo–Khitan Wars
Seo Hui
942–998; negotiated 993· Person· Rulers & states
Well documentedSolid records, physical evidence or scientific consensus.
A Goryeo statesman who talked a Khitan invasion army into withdrawing in 993 and gained land up to the Yalu River.
See it on the Korean History map →What happened
Seo Hui (서희, 942–998) came from a high-ranking family and passed the civil exam at 18. In 993 a Liao army under Xiao Xunning invaded and demanded land. While the court debated giving up everything north of Pyongyang, Seo Hui went to the Khitan camp, refused to bow as a subordinate, and argued Goryeo's case. The Khitans withdrew. Over the next three years he built six garrison towns along the lower Yalu River, known as the Gangdong six districts.
Why it matters
Without a battle he gained the land up to the lower Yalu, which became Goryeo's defensive line in later invasions. He is Korea's model diplomat.
Legacy and how we know
His biography in the Goryeosa records the talks in detail; the Liao history confirms the 993 campaign and the grant of land east of the Yalu.
Still debated
How much of the recorded dialogue is polished retelling, and whether Liao mainly wanted Goryeo neutral before attacking Song, are open questions.
Connections (2)
▸Seo Hui negotiated an end to the first round of Goryeo–Khitan WarsWell documented
The connection
In 993 the Khitan general Xiao Xunning invaded, claiming 800,000 men, and demanded land. Seo Hui went to his camp and struck a deal: Goryeo would cut formal ties with Song China and send envoys to Liao, while Liao withdrew and accepted Goryeo's control up to the Yalu. Goryeo then built six garrison towns there.
When and how
Winter 993, at the Khitan camp in Goryeo's northwest; Seo Hui and Xiao Xunning.
How we know
Seo Hui's biography in the Goryeosa gives the talks in detail; the Liao history confirms the campaign and the land grant east of the Yalu.
Debates and open questions
The 800,000 figure is surely inflated. Whether Seo Hui's skill or Liao's wish to free its army for war with Song decided the outcome is debated.
▸Seo Hui argued Goryeo was the heir of GoguryeoWell documented
The connection
Xiao Xunning claimed that Goryeo had risen from Silla land, so the old Goguryeo territory belonged to Liao. Seo Hui answered that Goryeo was Goguryeo's successor, which was why it was named Goryeo and kept a capital at Pyongyang; by that logic even Liao's eastern lands were rightfully Goryeo's.
When and how
993, at the Khitan camp in northwest Goryeo; Seo Hui and the Liao general Xiao Xunning.
How we know
The Goryeosa's biography of Seo Hui records the exchange in close detail.
Debates and open questions
The dialogue survives only on the Goryeo side and may have been polished; China's Northeast Project disputes the continuity he claimed.