Is “Advised Cao Cao not to interfere with succession, citing Yuan Shao and Liu Biao” true?
attested in history
According to Records of the Three Kingdoms, Book of Wei, Biography of Jia Xu, when Cao Cao asked about succession, Jia Xu said, 'Thinking of Yuan Benchu and Liu Jingsheng and their sons,' which awakened Cao Cao to establish Cao Pi.
Jia Xu
In official histories, he is a strategist who never miscalculates and served as Grand Tutor to Emperor Wen.