To oppose such a posture of Tang, Silla used Anseung, an illegitimate child of King Bojang of Goguryeo, who escaped to Silla with their remaining forces, by allowing him to live in Kinbasho (Iksan City, North Jeolla Province) to achieve a dominance relationship with him regarded as King of Goguryeo in August 670.
こうした唐の姿勢に対抗しようとして、高句麗の宝蔵王の庶子である安勝が残存勢力とともに新羅に亡命してきたのを利用し、金馬渚（全羅北道益山市）に住まわせて670年8月に高句麗王として封じた。