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.
Jian'an poetry
The term "Jian'an poetry" covers the final years at the end of the Han Dynasty and during which the Cao family was rising, or risen, to prominence were known as the "Jian'an" era (196-220), the final reign era of Emperor Xian of Han: the following period is known as the Three Kingdoms era, due to the three kingdoms which divided up the Han Dynasty, and war with one another for succession to the Han empire. A prominent Han dynasty general, Cao Cao effectively took control of the Han dynasty from the Liu imperial family, and following Cao Cao's death, his son Cao Pi formalized this by accepting the abdication of the last titular ruler of Han and establishing the Cao family as the ruling dynastic family of a new state, Wei (also known as Cao Wei), one of the Three Kingdoms which were successor states to the Han empire. Besides their role as leaders in war and politics, the Cao family also had an important role in the field of poetry and literature.