Bu cried out, "Your Excellency's only concern is me; I have already submitted. You will be the Grand General, and I will be your deputy; the world will be easily pacified." Cao Cao turned to Xuande and asked, "What do you think?" Xuande replied, "Have you forgotten the fates of Ding Jianyang and Dong Zhuo?" Cao Cao, wanting to establish an heir, hesitated and asked Jia Xu, "I wish to establish an heir, but whom should I appoint?" Jia Xu did not answer. Cao Cao asked why, and Jia Xu said, "I am currently pondering something, hence I cannot answer immediately." Cao Cao asked, "What are you pondering?" Jia Xu replied, "I am pondering Yuan Shao and Liu Biao, father and son." (A series where the wise understand instantly, while the foolish remain silent.)