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.
Cao Cao Mausoleum
During the forum, Lin Kuicheng, a historian and member of the China Federation of Literary and Art Circles, pointed out that Cao Cao should not be referred to as "King Wu of Wei" before 220 CE. After Cao Cao died in March 220 CE, his vassal king title – "King of Wei" – was inherited by his son, Cao Pi, who continued to hold the title until around December when he forced Emperor Xian, the last emperor of the Han dynasty, to abdicate in his favour. Since Cao Cao was buried about one month after his death and his funeral was most likely presided over by Cao Pi, it would be taboo to refer to Cao Cao as "King Wu of Wei" because the "King of Wei" (Cao Pi) was still living then. Furthermore, when Emperor Xian relinquished his throne to Cao Pi, he referred to Cao Pi and Cao Cao as "King of Wei" and "King Wu" respectively in his official abdication edict; Cao Cao was never referred to as "King Wu of Wei" in the edict.