King of Yān [Cáo] Yǔ appellation Péngzǔ. Jiàn’ān Sixteenth Year [211], he was given fief as a capital village Marquis. Twenty-second Year [217], he was changed fief to Marquis of Lǔyáng. Huángchū second Year [221], he was advanced in rank to Duke. Third Year [222], he became King of Xiàpī. Fifth Year [224], he was changed in fief to Shànfù county. Tàihé Sixth Year [232], he was changed in fief to King of Yān.

燕王宇字彭祖。建安十六年，封都鄉侯。二十二年，改封魯陽侯。黃初二年，進爵為公。三年，為下邳王。五年，改封單父縣。太和六年，改封燕王。

Míng-dì when young with Yǔ together matured, and always specially favored him. At the ascension to the throne, his treatment and bestowal was with the other Kings different. Qīnglóng Third Year [235], he was summoned to enter Court. Jǐngchū Inaugural Year [237], he returned to Yè. Second Year [238] Summer, he was again summoned to visit the capital. Winter Twelfth Moon, Míng-dì was critically ill, and appointed Yǔ as General-in-Chief, to entrust him with later affairs. He received office for four days, Yǔ deeply and firmly declined; the Emperor’s intentions also changed, and therefore dismissed Yǔ from office. Third Year Summer [239], he returned to Yè.

明帝少與宇同止，常愛異之。及即位，寵賜與諸王殊。青龍三年，徵入朝。景初元年，還鄴。二年夏，復徵詣京都。冬十二月，明帝疾篤，拜宇為大將軍，屬以後事。受署四日，宇深固讓；帝意亦變，遂免宇官。三年夏，還鄴。

During Jǐngchū, Zhèngyuán, and Jǐngyuán, he gradually increased in fief, joining with the previous to 5500 households. The Duke of Chángdào village [Cáo] Huàn was Yǔ’s son, and entered to continue the Main Clan Line.

景初、正元、景元中，累增邑，并前五千五百戶。常道鄉公奐，宇之子，入繼大宗。