List of emperors of the Han dynasty
The Han dynasty was founded by the peasant rebel leader (Liu Bang), known posthumously as Emperor Gao ("r". 202 –195 BC) or Gaodi. The longest reigning emperor of the dynasty was Emperor Wu ("r". 141–87 BC), or Wudi, who reigned for 54 years. The dynasty was briefly interrupted by the Xin dynasty of the former regent Wang Mang, but he was overthrown in 23 AD and the Han dynasty was reestablished by Liu Xiu, known posthumously as Emperor Guangwu (r. 25–57 AD), or Guangwu Di. The last Han emperor, Emperor Xian ("r". 189–220 AD), was a puppet monarch of Chancellor Cao Cao (155–220 AD), who dominated the court and was made King of Wei. In 220 AD, Cao's son Pi usurped the throne as Emperor Wen of Wei ("r". 220–226 AD) and ended the Han dynasty.
Cheng Yu
Cheng Yu (141 – December 220), originally named Cheng Li, courtesy name Zhongde, was an official who lived during the late Eastern Han dynasty of China. He was an adviser to Cao Cao, the warlord who became the "de facto" head of the Han central government during that period. He died in December 220 – a few months after Cao Cao's son, Cao Pi, usurped the throne from Emperor Xian (the last Han emperor) and established the state of Cao Wei, an event marking the start of the Three Kingdoms period in China. Cheng Yu was described as a tall man (approximately 1.91 metres) with a beautiful long beard. He was from Dong'e County in present-day Shandong. He was best known in his time for his abnormal approach to cope with a shortage of grain: instead of sending hostages to Cao Cao's rival, Yuan Shao, in exchange for food supplies, he advised Cao Cao to feed his army with human flesh. He was also noted for his expertise in military tactics, which helped Cao Cao defeat Yuan Shao at the Battle of Guandu in 200 and consolidate control over northern China. It is widely agreed that his numerous contributions laid the foundation of the Cao Wei state; the reason he was not promoted to the rank of a duke was only because of his aforementioned strategy to cope with the food shortage in Yan Province. After Cheng Yu's death, Cao Pi honoured him with the posthumous title "Marquis Su", meaning "solemn marquis".