Onjo settled in Wiryeseong (present-day Hanam), and called his country Sipje (십제, 十濟, meaning "Ten Vassals"), while Biryu settled in Michuhol (present-day Incheon), against the vassals' advice.
Onjo bosatte sig i Wiryeseong (nuværende Hanam), og kaldte sit land Sipje (십제, 十 濟, hvilket betyder "Ti vasaller"), mens Biryu bosatte sig i Michuhol (nuværende Incheon), mod de vasaller råd.