Question: Who was the son of the of the warlord that was posthumously honored as "Emperor Wu of Wei"?

<P0-S0> Cao Cao ( ; ; 155 – 15 March 220), courtesy name Mengde, was a Chinese warlord and the penultimate Chancellor of the Eastern Han dynasty who rose to great power in the final years of the dynasty. <P0-S1>  As one of the central figures of the Three Kingdoms period, he laid the foundations for what was to become the state of Cao Wei and was posthumously honoured as "Emperor Wu of Wei". <P0-S2>  He is often portrayed as a cruel and merciless tyrant in subsequent literature; he has also been praised as a brilliant ruler and military genius who treated his subordinates like his family. <P0-S3>  During the fall of the Eastern Han dynasty, Cao Cao was able to secure the most populated and prosperous cities of the central plains and northern China. <P0-S4>  Cao had much success as the Han chancellor, but his handling of the Han emperor Liu Xie was heavily criticized and resulted in a continued and then escalated civil war. <P0-S5>  Opposition directly gathered around warlords Liu Bei and Sun Quan, whom Cao was unable to quell. <P0-S6>  Cao was also skilled in poetry and martial arts and wrote many war journals. <SEP> <P1-S0> Xiao Zhangmao (蕭長懋) (458–493), courtesy name Yunqiao (雲喬), nickname Baize (白澤), formally Crown Prince Wenhui (文惠太子, literally "the civil and benevolent crown prince"), later further posthumously honored as Emperor Wen (文皇帝) with the temple name of Shizong (世宗), was a crown prince of the Chinese dynasty Southern Qi. <P1-S1>  He was Emperor Wu (Xiao Ze)'s oldest son, but predeceased his father. <P1-S2>  After his death, his son Xiao Zhaoye became crown prince and eventually succeeded Emperor Wu, but was soon thereafter overthrown by Emperor Wu's cousin Xiao Luan, who took over the throne. <P1-S3>  By 498, all of Xiao Zhangmao's descendants had been exterminated. <SEP> <P2-S0> 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. <P2-S1>  His mother was Lady Li (李姬), a concubine of Cao Cao. <P2-S2>  She also bore Cao Cao two other sons: Cao Zicheng and Cao Zijing. <P2-S3>  As his uncle Cao Shao (曹紹) had no heir, Cao Zizheng was adopted as Cao Shao's son. <P2-S4>  In 217, he was enfeoffed as the Marquis of Mei (郿侯). <P2-S5>  He died in the following year without a son to succeed him. <SEP> <P3-S0> Wei Zifu (Traditional Chinese: 衛子夫; Simplified Chinese: 卫子夫; pinyin: Weì Zǐfū) (died 91 BC), posthumously known as Empress Xiaowu Si (孝武思皇后) or Wei Si Hou (衛思后, "Wei the Thoughtful Empress"), was an empress during ancient China's Han Dynasty. <P3-S1>  She was the second wife of the famous Emperor Wu and his spouse of 49 years, and stayed as his empress for 38 years, the second longest in Chinese history (behind only the 42-year reign of Empress Wang, the wife of Ming Dynasty's Wanli Emperor, who came over 1,600 years later). <P3-S2>  She was the mother of Emperor Wu's heir apparent, Crown Prince Liu Ju, as well as the older half-sister of the famed general Wei Qing, the younger aunt of Huo Qubing, the step-aunt of Han statesman Huo Guang and the great-grandmother of Liu Bingyi.