Question: Who was the son of the of the warlord that was posthumously honored as "Emperor Wu of Wei"?
Sentence (from "Cao Zizheng"): Cao Zizheng (died 218) was a son of Cao Cao, a warlord who rose to power in the late Eastern Han dynasty and laid the foundation for the state of Cao Wei in the Three Kingdoms period of China.
Relevant evidence: Yes