Běihǎi Dào-wáng “Lamented King” [Cáo] Ruí, Huángchū Seventh Year [226], Míng-dì succeeded the throne, and established him as King of Yángpíng county. Tàihé Sixth Year [233], changed fief to Běihǎi. Qīnglóng Inaugural Year [233] he died. Second Year [234], the King of Lángyé’s son [Cáo] Zàn was transferred to be Ruí’s descendant, with fief as Chāng village Duke. Jǐngchū Second Year [238], he was established as King of Ráo’ān. Zhèngshǐ Seventh Year [246], transferred fief to Wén’ān. During Zhèngyuán and Jǐngyuán, gradually increased fief, adding with the previous to 3500 households.

北海悼王蕤，黃初七年，明帝即位，立為陽平縣王。太和六年，改封北海。青龍元年薨。二年，以琅邪王子贊奉蕤後，封昌鄉公。景初二年，立為饒安王。正始七年，徙封文安。正元、景元中，累增邑，并前三千五百戶。