He was a great-grandson of King Wonseong, and the son of Daeachan Kim Chung-gong.
He then schemed with Kim Rihong and others to overthrow King Huigang.
[1] They threatened the King and drove him to kill himself, which began to destabilize Silla, as Minae had defied the traditional hierarchy of the royal family of Silla and destroyed its legitimacy.
[2] In the following year, Kim Ujing allied himself with Jang Bogo, who sent his forces into the capital (Gyeongju) to topple and slay the king.
[4] Minae died at the soldiers' hands in the twelfth lunar month, early in 839.