Bokkai was founded as a nation by Dae Joyeong in 698, as it became the Dai Bugei (King Mu) period, the kingdom began having conflicts with the Tang Dynasty and Shiragi (Silla, an ancient Korean kingdom).
698年に大祚栄により建国された渤海(国)であるが、大武芸の時代になると唐や新羅と外交的に対立するようになった。