The Han dynasty was founded by the peasant rebel leader Liu Bang, known posthumously as Emperor Gao (r. 202–195 BC). The longest reigning emperor of the dynasty was Emperor Wu (r. 141–87 BC), who reigned for 54 years. The dynasty was briefly interrupted by the Xin dynasty of the former regent Wang Mang, but he was killed during a rebellion on 6 October 23 AD.[2] The Han dynasty was reestablished by Liu Xiu, known posthumously as Emperor Guangwu (r. 25–57 AD) or Guangwu Di, who claimed the throne on 5 August 25 AD.[3][4] 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.[5] On 11 December 220, Cao's son Pi usurped the throne as Emperor Wen of Wei (r. 220–226 AD) and ended the Han dynasty.[6]
The rulers of the previous Shang (c. 1600 – c. 1050 BC) and Zhou (c. 1056 – 256 BC) dynasties were referred to as 'king' (王wáng).[11] By the time of the Zhou dynasty, they were also referred to as the Son of Heaven.[11] In 221 BC, King Ying Zheng of Qin completed the conquest of all the Warring States of ancient China. To elevate himself above the Shang and Zhou kings, he accepted the new title of Emperor (皇帝huángdì) and is known to posterity as Qin Shi Huang, the 'First Emperor' of Qin. The new title of emperor was created by combining the titles for the Three Sovereigns and Five Emperors from Chinese mythology. This title was used by each successive ruler of China until the fall of the Qing dynasty in 1911.[12]
Posthumous, temple, and era names
From the Shang until the Sui dynasty (581–618) dynasty, Chinese rulers (both kings and emperors) were referred to by their posthumous names in records and historical texts. Temple names, first used during the reign of Emperor Jing of Han (r. 157–141 BC), were used exclusively in later records and historical texts when referring to emperors who reigned during the Tang (618–907), Song (960–1279), and Yuan (1271–1368) dynasties. During the Ming (1368–1644) and Qing (1644–1911) dynasties, a single era name was used for each emperor's reign and became the preferred way to refer to Ming and Qing emperors in historical texts.[13]
Use of the era name was formally adopted during the reign of Emperor Wu of Han (r. 141–87 BC), yet its origins can be traced back further. The oldest method of recording years—which had existed since the Shang—set the first year of a ruler's reign as year one. When an emperor died, the first year of a new reign period would begin. This system was changed by the 4th century BC when the first year of a new reign period did not begin until the first day of the lunar New Year following a ruler's death. When Duke Huiwen of Qin assumed the title of king in 324 BC, he changed the year count of his reign back to the first year.[14] For his newly adopted calendar established in 163 BC, Emperor Wen of Han (r. 180–157 BC) also set the year count of his reign back to the beginning.[15]
Since six was considered a lucky number, the emperors Jing and Wu changed the year count of their reigns back to the beginning every six years.[15] Since every six-year period was successively marked as yuannian (元年), eryuan (二元), sanyuan (三元), and so forth, this system was considered too cumbersome by the time it reached the fifth cycle wuyuan sannian (五元三年) in 114 BC.[15] In that year, a government official suggested that the Han court retrospectively rename every "beginning" with new characters; Emperor Wu accepted this reform in 110 BC.[16] Since Emperor Wu had just performed the religious feng (封) sacrifice at Mount Taishan, he named the new era yuanfeng (元封). This event is regarded as the formal establishment of era names in Chinese history.[16] Emperor Wu changed the era name once more when he established the 'Great Beginning' (太初Taichu) calendar in 104 BC.[17] From this point until the end of Western Han, the court established a new era name every four years of an emperor's reign. By the Eastern Han, there was no set interval for establishing new era names, which were often introduced for political reasons and celebrating auspicious events.[17]
Regents and empress dowagers
At times, especially when an infant emperor was placed on the throne, a regent, often the empress dowager or one of her male relatives, would assume the duties of the emperor until he reached his majority. Sometimes the empress dowager's faction—the consort clan—was overthrown in a coup d'état. For example, Empress Lü Zhi (d. 180 BC) was the de facto ruler of the court during the reigns of the child emperors Qianshao (r. 188–184 BC) and Houshao (r. 184–180 BC).[18] Her faction was overthrown during the Lü Clan disturbance of 180 BC and Liu Heng was named emperor (posthumously known as Emperor Wen).[19] Before Emperor Wu died in 87 BC, he had invested Huo Guang (d. 68 BC), Jin Midi (d. 86 BC), and Shangguan Jie (上官桀; d. 80 BC) with the power to govern as regents over his successor Emperor Zhao of Han (r. 87–74 BC). Huo Guang and Shangguan Jie were both grandfathers to Empress Shangguan (d. 37 BC), wife of Emperor Zhao, while the ethnically-Xiongnu Jin Midi was a former slave who had worked in an imperial stable. After Jin died and Shangguan was executed for treason, Huo Guang was the sole ruling regent. Following his death, the Huo family faction was overthrown by Emperor Xuan of Han (r. 74–49 BC), in revenge for Huo Guang poisoning his wife Empress Xu Pingjun (d. 71 BC) so that he could marry Huo's daughter Empress Huo Chengjun (d. 54 BC).[20]
^ abcBesides Liu Bang and Liu Xiu, the word xiao (孝 'filial') was prefixed to all posthumous names, although it is usually omitted by scholars. The word huangdi (皇帝emperor) is also abbreviated. Commonly only the second character is used; e.g., Wudi (武帝, Emperor Wu) for Xiaowu Huangdi (孝武皇帝).[21]
^ abcThe years of the Chinese lunisolar calendar do not correspond exactly with the years given in the column for era names. Some years given in the table also belong to two reign periods because some era names were adopted before the beginning of the following year.
^Ruzi was prince, rather than emperor of Han. Officially, the throne of emperor of Han was vacant during 6–9 AD.
^de Crespigny, Rafe (2010). A Biography of Cao Cao 155-220 AD. Brill]]. p. 450. ISBN978-90-04-18830-3. On 11 December [...] Cao Cao's son and successor Cao Pi received the abdication of the last emperor of Han. [...] Some authorities give the date of abdication as 25 November [...] This is the date upon which Emperor Xian issued an edict calling upon Cao Pi to take the throne, but the ceremonial transfer of sovereignty was carried out two weeks later
^Bo 1977, p. 495. While traditional sources do not give an exact date when the Yuanshi era was announced, it was implied that the first year of Yuanshi did not start until the first month of the lunar calendar – i.e., in 1 AD. See, e.g., Ban Gu, Book of Han, vol. 12.
Loewe, Michael (2000). A Biographical Dictionary of the Qin, Former Han, and Xin Periods (221 BC – AD 24). Boston: Brill. ISBN978-90-04-10364-1.
Paludan, Ann (1998). Chronicle of the Chinese Emperors: the Reign-by-Reign Record of the Rulers of Imperial China. London: Thames & Hudson. ISBN978-0-500-05090-3.
Sato, Masayuki (1991). "Comparative Ideas of Chronology". History and Theory. 30 (2): 275–301. JSTOR2505559.
Torday, Laszlo (1997). Mounted Archers: The Beginnings of Central Asian History. Durham Academic Press. ISBN978-1-900838-03-0.
de Visser, M. W. (2003). Dragon in China and Japan. Kessinger. ISBN978-0-7661-5839-9.
Wang, Yu-ch'uan (1949). "An Outline of the Central Government of the Former Han Dynasty". Harvard Journal of Asiatic Studies. 12 (1/2): 134–187. JSTOR2718206.
Wilkinson, Endymion (1998). Chinese History: A Manual. Harvard University Asia Center, Harvard University Press. ISBN978-0-674-12378-6.