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