郭淮
When Cao Pi held the position of General of the Household for All Purposes () between 211 and 220, he recruited Guo Huai to serve as an officer in the law enforcement bureau under his charge. Guo Huai was later reassigned to be a clerk in the military affairs bureau of the office of the Imperial Chancellor, the position held by Cao Pi's father Cao Cao, the warlord who controlled the Han central government and the figurehead Emperor Xian since 196.