In the founding legends of Goryeo, Chakchegon married the daughter of the Dragon King of the Western Sea.
He became rich and influential via the Yellow Sea maritime trade, extending his influence beyond Songak to Chongju, Yonan, Paechon, and Ganghwa.
In Min Chi's Pyeonnyeon Gangmok (편년강목; 編年綱目), he claimed that earlier Goryeo historians such as Kim had confused Xuanzong with Suzong, due to the latter's posthumous name.
Joseon historians dismissed the idea of a Tang emperor being Chakchegon's father as Seon Buddhist myths and legends.
[3] However according to the Seongwonnok (성원녹; 聖源録) cited in the Goryeosa, Chakchegon's wife was the daughter of gakgan Dueunjeom, a local strongman from Pyongju.