Cao Mao
Cao Rui's successor was Cao Zan, a son of Cao Min, Cao Ju's heir and Prince of Langya. Cao Jian had no heir. Cao Lin had two sons: Cao Qi and Cao Mao. Cao Mao married Empress Bian, Bian Long's daughter. Bian Long was Bian Lan's son, Bian Lan was Bian Bing's son. Bian Bing was a younger brother of Cao Pi's mother Lady Bian.