|Seong of Balhae|
|Revised Romanization||Seong wang|
|Revised Romanization||Dae Hwa-yeo|
He was the grandson of Mun of Balhae and Empress Hyoui.His father Dae Goeng-rim who died before inheriting the inheriting the throne.
He chose the era name Jungheung (중흥, 中興). King Seong was a very physically weak person, and lived for a few months after his rise to the throne. The most notable accomplishment that was done during his reign was the moving of the capital to Sanggyeong.
He didn't marry or had children.After his death his uncle,Gang of Balhae,became King.