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Zhou dynasty

The Zhou dynasty was a royal dynasty of China that existed for 789 years from c. 1046 BC until 256 BC, the longest of such reign in Chinese history. During the Western Zhou period (c. 1046 – 771 BC), the royal house, surnamed Ji, had military control over ancient China. Even as Zhou suzerainty became increasingly ceremonial over the following Eastern Zhou period (771–256 BC), the political system created by the Zhou royal house survived in some form for several additional centuries. A date of 1046 BC for the Zhou's establishment is supported by the Xia–Shang–Zhou Chronology Project and David Pankenier, but David Nivison and Edward L. Shaughnessy date the establishment to 1045 BC.

The latter Eastern Zhou period is itself roughly subdivided into two parts. During the Spring and Autumn period (c. 771), power became increasingly decentralized as the authority of the royal house diminished. The Warring States period (c. 481 – 221 BC) that followed saw large-scale warfare and consolidation among what had formerly been Zhou client states, until the Zhou were formally extinguished by the state of Qin in 256 BC. The Qin ultimately founded the imperial Qin dynasty in 221 BC after conquering all of China.

The Zhou period is often considered to be the zenith for the craft of Chinese bronzeware. The latter Zhou period is also famous for the advent of three major Chinese philosophies: Confucianism, Taoism and Legalism. The Zhou dynasty also spans the period when the predominant form of written Chinese became seal script, which evolved from the earlier oracle bone and bronze scripts. By the dynasty's end, an immature form of clerical script had also emerged.

Traditional myth
According to Chinese mythology, the Zhou lineage began when Jiang Yuan, a consort of the legendary Emperor Ku, miraculously conceived a child, Qi "the Abandoned One", after stepping into the divine footprint of Shangdi. Qi was a culture hero credited with surviving abandonment by his mother three times, and with greatly improving agriculture, to the point where he was granted lordship over Tai, the surname Ji, and the title Houji "Lord of Millet", by the Emperor Shun. He even received sacrifice as a harvest god. The term Houji was probably a hereditary title attached to a lineage.

Buzhu—Qi's son, or rather that of the Houji—is said to have abandoned his position as Agrarian Master in old age and either he or his son Ju abandoned their tradition, living in the manner of the Xirong and Rongdi (see Hua–Yi distinction). Ju's son Liu, however, led his people to prosperity by restoring agriculture and settling them at a place called Bin, which his descendants ruled for generations. Tai later led the clan from Bin to Zhou, an area in the Wei River valley (modern Qishan County).

The duke passed over his two elder sons Taibo and Zhongyong to favor the younger Jili, a warrior in his own right. As a vassal of the Shang kings Wu Yi and Wen Ding, Jili went to conquer several Xirong tribes before being treacherously killed by Shang forces. Taibo and Zhongyong had supposedly already fled to the Yangtze delta, where they established the state of Wu among the tribes there. Jili's son Wen bribed his way out of imprisonment and moved the Zhou capital to Feng (present-day Xi'an). Around 1046 BC, Wen's son Wu and his ally Jiang Ziya led an army of 45,000 men and 300 chariots across the Yellow River and defeated King Zhou of Shang at the Battle of Muye, marking the beginning of the Zhou dynasty. The Zhou enfeoffed a member of the defeated Shang royal family as the Duke of Song, which was held by descendants of the Shang royal family until its end. This practice was referred to as Two Kings, Three Reverences.

Culture
According to Nicholas Bodman, the Zhou appear to have spoken a language largely similar in vocabulary and syntax to that of the Shang; a recent study by David McCraw, using lexical statistics, reached the same conclusion. The Zhou emulated Shang cultural practices, possibly to legitimize their own rule, and became the successors to Shang culture. At the same time, the Zhou may also have been connected to the Xirong, a broadly defined cultural group to the west of the Shang, which the Shang regarded as tributaries. For example, the philosopher Mencius (372–289 BC) acknowledged that King Wen of Zhou had ancestry from among the Xirong as King Wen's descendants. The Zhou kings claimed descent from Hou Ji, a legendary culture hero possibly related to the Xirong through his mother Jiang Yuan. Additionally, the late 4th-century BCE Zuo Zhuan comments that the baron of Li Rong, after being defeated by Jin, married his daughter Li Ji off. According to historian Li Feng, the term "Rong" during the Western Zhou period was likely used to designate political and military adversaries rather than cultural and ethnic "others". Cultural artifacts of the Western Rong coexisted with Western Zhou bronzes, indicating close bonds between the Rong and the Western Zhou.

Western Zhou
During the Western Zhou (1045–771 BC), King Wu maintained the old capital for ceremonial purposes but constructed a new one for his palace and administration nearby at Haojing. Although Wu's early death left a young and inexperienced heir, the Duke of Zhou assisted his nephew King Cheng in consolidating royal power. Wary of the Duke of Zhou's increasing power, the "Three Guards", Zhou princes stationed on the eastern plain, rose in rebellion against his regency. Even though they garnered the support of independent-minded nobles, Shang partisans, and several Dongyi tribes, the Duke of Zhou quelled the rebellion, and further expanded the Zhou Kingdom into the east. To maintain Zhou authority over its greatly expanded territory and prevent other revolts, he set up the fengjian system. Furthermore, he countered Zhou's crisis of legitimacy by expounding the doctrine of the Mandate of Heaven while accommodating important Shang rituals at Wangcheng and Chengzhou.

Over time, this decentralized system became strained as the familial relationships between the Zhou kings and the regional dynasties thinned over the generations. Peripheral territories developed local power and prestige on par with that of the Zhou.

The conflicts with nomadic tribes from the north and the northwest, variously known as the Xianyun, Guifang, or various "Rong" tribes, such as the Xirong, Shanrong or Quanrong, intensified towards the end of the Western Zhou period. These tribes are recorded as harassing Zhou territory, but at the time the Zhou were expanding northwards, encroaching on their traditional lands—especially the Wei River valley. Archaeologically, the Zhou expanded to the north and the northwest at the expense of the Siwa culture.

When King You demoted and exiled his Jiang queen in favor of the commoner Bao Si, the disgraced queen's father the Marquis of Shen joined with Zeng and the Quanrong. The Quanrong put an end to the Western Zhou in 771 BC, sacking the Zhou capital at Haojing and killing the last Western Zhou king You. With King You dead, a conclave of nobles met at Shen and declared the Marquis's grandson King Ping. The capital was moved eastward to Wangcheng, marking the beginning of the Eastern Zhou period.

Eastern Zhou
The Eastern Zhou period (771–256 BC) was characterized by an accelerating collapse of royal authority, although the king's ritual importance enabled more than five additional centuries of rule. The Spring and Autumn Annals, the Confucian chronicle of the early years of this process, gave the period its name as the Spring and Autumn period. The partition of Jin during the mid-5th century BC is a commonly cited as initiating the subsequent Warring States period. In 403 BC, the Zhou court recognized Han, Zhao, and Wei as fully independent states. In 344, Duke Hui of Wei was the first to claim the title of "king" for himself. Others followed, marking a turning point, as rulers did not even entertain the pretense of vassalage of the Zhou court, instead proclaiming themselves fully independent kingdoms. A series of states rose to prominence before each falling in turn, and in most of these conflicts Zhou was a minor player.

The last Zhou king is traditionally taken to be Nan, who was killed when Qin captured Wangcheng in 256 BC. Duke Wen of Eastern Zhou declared himself to be "King Hui", was declared, but his splinter state was fully disassembled by 249. Qin's wars of unification concluded in 221 BC with Qin Shi Huang's annexation of Qi.

The Eastern Zhou is also remembered as the golden age of Chinese philosophy: the Hundred Schools of Thought which flourished as rival lords patronized itinerant scholars is led by the example of Qi's Jixia Academy. The Nine Schools of Thought which came to dominate the others were Confucianism as interpreted by Mencius and others, Legalism, Taoism, Mohism, the utopian communalist Agriculturalism, two strains of the School of Diplomacy, the School of Names, Sun Tzu's School of the Military, and the School of Naturalists. While only the first three of these would receive imperial patronage in later dynasties, doctrines from each influenced the others and Chinese society in sometimes unusual ways. The Mohists for instance found little interest in their praise of meritocracy but much acceptance for their mastery of defensive siege warfare; much later, however, their arguments against nepotism were used in favor of establishing the imperial examination system.

Culture and society
The Zhou heartland was the Wei River valley; this remained their primary base of power after conquering the Shang.

Mandate of Heaven
Zhou rulers introduced the Mandate of Heaven, which would prove to be among East Asia's most enduring political doctrines. According to the theory, Heaven imposed a mandate to replace the Shang on the Zhou, whose moral superiority justified seizing Shang wealth and territory in order to return good governance to the people.

The Mandate of Heaven was presented as a religious compact between the Zhou people and their supreme god in heaven. The Zhou agreed that since worldly affairs were supposed to align with those of the heavens, the heavens conferred legitimate power on only one person, the Zhou ruler. In return, the ruler was duty-bound to uphold heaven's principles of harmony and honor. Any ruler who failed in this duty, who let instability creep into earthly affairs, or who let his people suffer, would lose the mandate. Under this system, it was the prerogative of spiritual authority to withdraw support from any wayward ruler and to find another, more worthy one. In this way, the Zhou sky god legitimized regime change.

In using this creed, the Zhou rulers had to acknowledge that any group of rulers, even they themselves, could be ousted if they lost the mandate of heaven because of improper practices. The book of odes written during the Zhou period clearly intoned this caution.

The Zhou kings contended that heaven favored their triumph because the last Shang kings had been evil men whose policies brought pain to the people through waste and corruption. After the Zhou came to power, the mandate became a political tool.

One of the duties and privileges of the king was to create a royal calendar. This official document defined times for undertaking agricultural activities and celebrating rituals. But unexpected events such as solar eclipses or natural calamities threw the ruling house's mandate into question. Since rulers claimed that their authority came from heaven, the Zhou made great efforts to gain accurate knowledge of the stars and to perfect the astronomical system on which they based their calendar.

Zhou legitimacy also arose indirectly from Shang material culture through the use of bronze ritual vessels, statues, ornaments, and weapons.2013 As the Zhou emulated the Shang's large scale production of ceremonial bronzes, they developed an extensive system of bronze metalworking that required a large force of tribute labor. Many of its members were Shang, who were sometimes forcibly transported to new Zhou to produce the bronze ritual objects which were then sold and distributed across the lands, symbolizing Zhou legitimacy.

Feudalism
Western writers often describe the Zhou period as feudal because the Zhou's fengjian system invites comparison with European political systems during the Middle Ages. There were many similarities between the decentralized systems. When the dynasty was established, the conquered land was divided into hereditary fiefs (諸侯, zhūhóu) that eventually became powerful in their own right. In matters of inheritance, the Zhou dynasty recognized only patrilineal primogeniture as legal. According to Hsi-Sheng Tao, "the Tsung-fa or descent line system has the following characteristics: patrilineal descent, patrilineal succession, patriarchate, sib-exogamy, and primogeniture"

The system, also called "extensive stratified patrilineage", was defined by the anthropologist Kwang-chih Chang as "characterized by the fact that the eldest son of each generation formed the main of line descent and political authority, whereas the younger brothers were moved out to establish new lineages of lesser authority. The farther removed, the lesser the political authority". Ebrey defines the descent-line system as follows: "A great line (ta-tsung) is the line of eldest sons continuing indefinitely from a founding ancestor. A lesser line is the line of younger sons going back no more than five generations. Great lines and lesser lines continually spin off new lesser lines, founded by younger sons".

K.E. Brashier writes in his book "Ancestral Memory in Early China" about the tsung-fa system of patrilineal primogeniture: "The greater lineage, if it has survived, is the direct succession from father to eldest son and is not defined via the collateral shifts of the lesser lineages. In discussions that demarcate between trunk and collateral lines, the former is called a zong and the latter a zu, whereas the whole lineage is dubbed the shi. [...] On one hand, every son who is not the eldest and hence not heir to the lineage territory has the potential of becoming a progenitor and fostering a new trunk lineage (Ideally he would strike out to cultivate new lineage territory). [...] According to the Zou commentary, the son of heaven divided land among his feudal lords, his feudal lords divided the land among their dependent families and so forth down the pecking order to the officers who had their dependent kin and the commoners who "each had his apportioned relations and all had their graded precedence""

This type of unilineal descent-group later became the model of the Korean family through the influence of Neo-Confucianism, as Zhu Xi and others advocated its re-establishment in China.

Fengjian system and bureaucracy
There were five peerage ranks below the royal ranks, in descending order with common English translations: gōng 公 "duke", hóu 侯 "marquis", bó 伯 "count", zǐ 子 "viscount", and nán 男 "baron". At times, a vigorous duke would take power from his nobles and centralize the state. Centralization became more necessary as the states began to war among themselves and decentralization encouraged more war. If a duke took power from his nobles, the state would have to be administered bureaucratically by appointed officials.

Despite these similarities, there are a number of important differences from medieval Europe. One obvious difference is that the Zhou ruled from walled cities rather than castles. Another was China's distinct class system, which lacked an organized clergy but saw Shang-descent yeomen become masters of ritual and ceremony, as well as astronomy, state affairs and ancient canons, known as ru (儒). When a dukedom was centralized, these people would find employment as government officials or officers. These hereditary classes were similar to Western knights in status and breeding, but unlike the European equivalent, they were expected to be something of a scholar instead of a warrior. Being appointed, they could move from one state to another. Some would travel from state to state peddling schemes of administrative or military reform. Those who could not find employment would often end up teaching young men who aspired to official status. The most famous of these was Confucius, who taught a system of mutual duty between superiors and inferiors. In contrast, the Legalists had no time for Confucian virtue and advocated a system of strict laws and harsh punishments.

Agriculture
Agriculture in the Zhou dynasty was very intensive and, in many cases, directed by the government. All farming lands were owned by nobles, who then gave their land to their serfs, a situation similar to European feudalism. For example, a piece of land was divided into nine squares in the well-field system, with the grain from the middle square taken by the government and that of surrounding squares kept by individual farmers. This way, the government was able to store surplus food and distribute it in times of famine or bad harvest. Some important manufacturing sectors during this period included bronze smelting, which was integral to making weapons and farming tools. Again, these industries were dominated by the nobility who directed the production of such materials.

China's first projects of hydraulic engineering were initiated during the Zhou dynasty, ultimately as a means to aid agricultural irrigation. Sunshu Ao, the Chancellor of Wei who served King Zhuang of Chu, dammed a river to create an enormous irrigation reservoir in modern-day northern Anhui province. For this, Sunshu is credited as China's first hydraulic engineer. The later Wei statesman Ximen Bao, who served Marquis Wen of Wei (445–396 BC), was the first hydraulic engineer of China to have created a large irrigation canal system. As the main focus of his grandiose project, his canal work eventually diverted the waters of the entire Zhang River to a spot further up the Yellow River.

Military

The early Western Zhou supported a strong army, split into two major units: "the Six Armies of the west" and "the Eight Armies of Chengzhou". The armies campaigned in the northern Loess Plateau, modern Ningxia and the Yellow River floodplain. The military prowess of Zhou peaked during the 19th year of King Zhao's reign, when the six armies were wiped out along with King Zhao on a campaign around the Han River. Early Zhou kings were true commanders-in-chief

King Zhao was famous for repeated campaigns in the Yangtze region, and died on campaign. Later kings' campaigns were less effective. King Li led 14 armies against barbarians in the south, but failed to achieve any victory. King Xuan fought the Quanrong nomads in vain. King You was killed by the Quanrong when Haojing was sacked. Although chariots had been introduced to China during the Shang dynasty from Central Asia, the Zhou period saw the first major use of chariots in battle. Recent archaeological finds demonstrate similarities between horse burials of the Shang and Zhou dynasties with the steppe populations in the west, such as the Saka and Wusun. Other possible cultural influences resulting from contact with these Iranic people of Central Asia in this period may include fighting styles, head-and-hooves burials, art motifs and myths.

The Zhou army also included "barbarian" troops such as the Di people. King Hui of Zhou married a princess of the Red Di as a sign of appreciation for the importance of the Di troops. King Xiang of Zhou also married a Di princess after receiving Di military support.

Philosophy
During the Zhou dynasty, the origins of native Chinese philosophy developed, its initial stages of development beginning in the 6th century BC. The greatest Chinese philosophers, those who made the greatest impact on later generations of Chinese, were Confucius, founder of Confucianism, and Laozi, founder of Taoism. Other philosophers of this era were Mozi, founder of Mohism; Mencius, the "second sage" of Confucianism; Shang Yang and Han Fei, responsible for the development of ancient Chinese Legalism; and Xunzi, who was arguably the center of ancient Chinese intellectual life during his time.

The state theology of the Zhou dynasty used concepts from the Shang dynasty and mostly referred to the Shang god, Di, as Tian, a more distant and unknowable concept, yet one that anyone could utilize, the opposite view of the Shang's spirituality. The Zhou wanted to increase the number of enlightenment seekers, mystics, and those who would be interested in learning about such things as a way to further distance their people from the Shang-era paradigm and local traditions.

Li
Having emerged during the Western Zhou, the li ritual system encoded an understanding of manners as an expression of the social hierarchy, ethics, and regulation concerning material life; the corresponding social practices became idealized within Confucian ideology.

The system was canonized in the Book of Rites, Rites of Zhou, and Etiquette and Ceremonial compiled during the Han dynasty (202 BC – 220 AD), thus becoming the heart of the Chinese imperial ideology. While the system was initially a respected body of concrete regulations, the fragmentation of the Western Zhou period led the ritual to drift towards moralization and formalization in regard to:

 * The five orders of Chinese nobility
 * Ancestral temples (size, legitimate number of pavilions)
 * Ceremonial regulations (number of ritual vessels, musical instruments, people in the dancing troupe)

Kings
The rulers of the Zhou dynasty were titled wang (王), which was also the term used by the Shang rulers, normally translated into English as 'king'. In addition to these rulers, King Wu's immediate ancestors—Danfu, Jili, and Wen—are also referred to as "Kings of Zhou", despite having been nominal vassals of the Shang kings.

Nobles of the Ji family proclaimed Duke Hui of Eastern Zhou as King Nan's successor after their capital, Chengzhou, fell to Qin forces in 256 BC. Ji Zhao, a son of King Nan, led a resistance against Qin for five years. The dukedom fell in 249 BC. The remaining Ji family ruled Yan and Wei until 209 BC.

During Confucius's lifetime in the Spring and Autumn period, Zhou kings had little power, and much administrative responsibility and de-facto political strength was wielded by rulers of smaller domains and local community leaders.

Astrology

In traditional Chinese astrology, Zhou is represented by two stars, Eta Capricorni and 21 Capricorni, in "Twelve States" asterism. Zhou is also represented by the star Beta Serpentis in asterism "Right Wall", Heavenly Market enclosure.

title: Zhou dynasty


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Shang dynasty

The Shang dynasty, also known as the Yin dynasty , was a Chinese royal dynasty that ruled in the Yellow River valley during the second millennium BC, traditionally succeeding the Xia dynasty and followed by the Western Zhou dynasty. The classic account of the Shang comes from texts such as the Book of Documents, Bamboo Annals and Records of the Grand Historian. Modern scholarship dates the dynasty between the 16th and 11th centuries BC, with more agreement surrounding the end date than beginning date.

The Shang dynasty is the earliest dynasty of traditional Chinese history firmly supported by archaeological evidence. Excavation at the last Shang capital Yinxu, near modern-day Anyang, uncovered eleven major royal tombs and the foundations of palaces and ritual sites, containing weapons of war and remains from both animal and human sacrifices. Tens of thousands of bronze, jade, stone, bone, and ceramic artefacts have been found.

The Anyang site has yielded the earliest known body of Chinese writing, mostly divinations inscribed on oracle bones – usually turtle shells or ox scapulae. More than 20,000 were discovered in the initial scientific excavations during the 1920s and 1930s, and over four times as many have been found since. The inscriptions provide critical insight into many topics from the politics, economy, and religious practices to the art and medicine of the early stages of Chinese history.

Traditional accounts
Several of the Chinese classics discuss the history of the Shang, including the Book of Documents, the Mencius and the Zuo Zhuan. From the sources available to him, the Han dynasty historian Sima Qian assembled a chronological account of the Shang as part of the Records of the Grand Historian (c. 91 BC). Sima describes some Shang-era events in detail, while others are only mentioned as taking place during the reign of a particular king. A slightly different account of the Shang is given in the Bamboo Annals, a text whose history is complex: while originally interred in 296 BC, the authenticity of the manuscripts that have survived is controversial.

Throughout history, the Shang have also been referred to as "Yin". The Records of the Grand Historian and the Bamboo Annals each use this name for both the dynasty, as well as its final capital. Since Huangfu Mi's Records of Emperors and Kings in the 3rd century AD, "Yin" has been frequently used to refer specifically to the latter half of the Shang. It is also the name predominantly used for the dynasty in Japan, Korea, and Vietnam, being rendered as, and Ân in Japanese, Korean, and Vietnamese respectively. The name seems to have originated during the subsequent Zhou dynasty; it does not appear in oracle bone inscriptions—which refer to the state as "Shang", and to its capital as —nor does it appear in any bronze inscriptions securely dated to the Western Zhou (c. 1046 – 771 BC).

Founding myth
The founding myth of the Shang dynasty is described by Sima Qian in the Annals of the Yin. In the text, a woman named Jiandi, who was the second wife of Emperor Ku, swallowed an egg dropped by a black bird and subsequently gave birth miraculously to Xie. Xie is said to have helped Yu the Great to control the Great Flood and for his service to have been granted a place called Shang as a fief. The period before the Shang dynasty was established is known as the "Predynastic Shang" (or "Proto-Shang").

Dynastic course
In the Annals of the Yin, Sima Qian writes that the dynasty was founded 13 generations after Xie, when Xie's descendant Tang overthrew the impious and cruel final Xia ruler in the Battle of Mingtiao. The Records of the Grand Historian recount events from the reigns of Tang, Tai Jia, Tai Wu, Pan Geng, Wu Ding, Wu Yi and the depraved final king Di Xin, but the rest of the Shang rulers are merely mentioned by name. In the last century, Wang Guowei demonstrated that the succession to the Shang throne matched the list of kings in Sima Qian's Records of the Grand Historian. According to the Records of the Grand Historian, the Shang moved their capital five times, with the final move to Yin in the reign of Pan Geng inaugurating the golden age of the dynasty.

Di Xin, the last Shang king, is said to have committed suicide after his army was defeated by Wu of Zhou. Legends say that his army and his equipped slaves betrayed him by joining the Zhou rebels in the decisive Battle of Muye. According to the Yi Zhou Shu and Mencius the battle was very bloody. The classic, Ming-era novel Fengshen Yanyi retells the story of the war between Shang and Zhou as a conflict with rival factions of gods supporting different sides in the war.

After the Shang were defeated, King Wu allowed Di Xin's son Wu Geng to rule the Shang as a vassal kingdom. However, Zhou Wu sent three of his brothers and an army to ensure that Wu Geng would not rebel. After Zhou Wu's death, the Shang joined the Rebellion of the Three Guards against the Duke of Zhou, but the rebellion collapsed after three years, leaving Zhou in control of Shang territory.

Descendants of the Shang royal family
After the collapse of the Shang dynasty, Zhou's rulers forcibly relocated "Yin diehards" and scattered them throughout Zhou territory. Some surviving members of the Shang royal family collectively changed their surname from the ancestral name Zi to the name of their fallen dynasty, Yin. The family retained an aristocratic standing and often provided needed administrative services to the succeeding Zhou dynasty. King Wu of Zhou ennobled Lin Jian, the son of Prince Bigan, as the Duke of Bo'ling. The Records of the Grand Historian states that King Cheng of Zhou, with the support of his regent and uncle, the Duke of Zhou, enfeoffed Weiziqi, a brother of Di Xin, as the Duke of Song, with its capital at Shangqiu. This practice was known as 'enfeoffment of three generations for two kings'. The dukes of Song would maintain rites honouring the Shang kings until Qi conquered Song in 286 BC. Confucius was possibly a descendant of the Shang Kings through the Dukes of Song.

The Eastern Han dynasty bestowed the title of Duke of Song and 'Duke Who Continues and Honours the Yin' upon Kong An, because he was part of the legacy of the Shang. This branch of the Confucius family is a separate branch from the line that held the title of Marquis of Fengsheng village and later Duke Yansheng.

Another remnant of the Shang established the vassal state of Guzhu (present-day Tangshan), which Duke Huan of Qi destroyed. Many Shang clans that migrated northeast after the dynasty's collapse were integrated into Yan culture during the Western Zhou period. These clans maintained an elite status and continued practising the sacrificial and burial traditions of the Shang.

Both Korean and Chinese legends, including reports in the Book of Documents and the Bamboo Annals, state that a disgruntled Shang prince named Jizi, who had refused to cede power to the Zhou, left China with a small army. According to these legends, he founded a state known as Gija Joseon in northwest Korea during the Gojoseon period of ancient Korean history. However, scholars debate the historical accuracy of these legends.

Early Bronze Age archaeology
Before the 20th century, the Zhou dynasty (1046–256 BC) was the earliest that could be verified from its own records. However, during the Song dynasty (960–1279 AD), antiquarians collected bronze ritual vessels attributed to the Shang era, some of which bore inscriptions.

Yellow River valley
In 1899, several scholars noticed that Chinese pharmacists were selling "dragon bones" marked with curious and archaic characters. These were finally traced back in 1928 to what is now called Yinxu, north of the Yellow River near Anyang, where the Academia Sinica undertook archaeological excavation until the Second Sino-Japanese War in 1937. Archaeologists focused on the Yellow River valley in Henan as the most likely site of the states described in the traditional histories.

After 1950, the remnants of the earlier walled settlement of Zhengzhou Shang City were discovered within the modern city of Zhengzhou. It has been determined that the earth walls at Zhengzhou, erected in the 15th century BC, would have been 20 m wide at the base, rising to a height of 8 m, and formed a roughly rectangular wall 7 km around the ancient city. The rammed earth construction of these walls was an inherited tradition, since much older fortifications of this type have been found at Chinese Neolithic sites of the Longshan culture (c. 3000}. In 2022, excavation of an elite tomb inside the city walls yielded over 200 artefacts, including a gold face covering measuring 18.3 by.

In 1959, the site of the Erlitou culture was found in Yanshi, south of the Yellow River near Luoyang. Radiocarbon dating suggests that the Erlitou culture flourished c. 2100 BC to 1800 BC. They built large palaces, suggesting the existence of an organized state. In 1983, Yanshi Shang City was discovered 6 km north-east of the Erlitou site in Yanshi's Shixianggou Township. This was a large walled city dating from 1600 BC. It had an area of nearly 200 ha and featured pottery characteristic of the Erligang culture.

The remains of a walled city of about 470 ha were discovered in 1999 across the Huan River from the well explored Yinxu site. The city, now known as Huanbei, was apparently occupied for less than a century and destroyed shortly before the construction of the Yinxu complex. Between 1989 and 2000, an important Shang settlement was excavated near Xiaoshuangqiao, about 20 km northwest of Zhengzhou. Covering an intermediary period between the Zhengzhou site and the late capitals on the Huan River, it features most prominently sacrificial pits with articulated skeletons of cattle, a quintessential part of the late Shang ritual complex. Chinese historians were accustomed to the notion of one dynasty succeeding another, and readily identified the Erligang and Erlitou sites with the early Shang and Xia dynasty of traditional histories. The actual political situation in early China may have been more complicated, with the Xia and Shang being political entities that existed concurrently, just as the early Zhou, who established the successor state of the Shang, are known to have existed at the same time as the Shang. It has also been suggested the Xia legend originated as a Shang myth of an earlier people who were their opposites.

Other sites
The Erligang culture centred on the Zhengzhou site is found across a wide area of China, even as far northeast as the area of modern Beijing, where at least one burial in this region during this period contained both Erligang-style bronze utensils and local-style gold jewellery. The discovery of a Chenggu-style dagger-axe at Xiaohenan demonstrates that even at this early stage of Chinese history, there were some ties between the distant areas of north China. The Panlongcheng site in the middle Yangtze valley was an important regional centre of the Erligang culture.

Accidental finds elsewhere in China have revealed advanced civilizations contemporaneous with but culturally unlike the settlement at Anyang, such as the walled city of Sanxingdui in Sichuan. Western scholars are hesitant to designate such settlements as belonging to the Shang. Also unlike the Shang, there is no known evidence that the Sanxingdui culture had a system of writing. The late Shang state at Anyang is thus generally considered the first verifiable civilization in Chinese history.

In contrast, the earliest layers of the Wucheng culture predating Anyang have yielded pottery fragments containing short sequences of symbols, suggesting that they may be a form of writing quite different in form from oracle bone characters, but the sample is too small for decipherment.

Genetic studies
A study of mitochondrial DNA from Yinxu commoner graves showed similarity with modern northern Han Chinese, but significant differences from southern Han Chinese.

Absolute chronology
The earliest securely dated event in Chinese history is the start of the Gonghe Regency in 841 BC, early in the Zhou dynasty, a date first established by Sima Qian. Attempts to establish earlier dates have been plagued by doubts about the origin and transmission of traditional texts and the difficulties in their interpretation. More recent attempts have compared the traditional histories with archaeological and astronomical data. At least 44 dates for the end of the dynasty have been proposed, ranging from 1130 to 1018 BC.

 * The traditional dates of the dynasty, from 1766 to 1122 BC, were calculated by Liu Xin during the Han dynasty.
 * A calculation based on the "old text" of the Bamboo Annals yields dates of 1523 to 1027 BC.
 * David Pankenier, by attempting to identify astronomical events mentioned in Zhou texts, dated the beginning of the dynasty at 1554 BC and its overthrow at 1046 BC.
 * The Xia–Shang–Zhou Chronology Project identified the establishment of the dynasty with the foundation of an Erligang culture walled city at Yanshi, dated at c. 1600 BC. The project also arrived at an end date of 1046 BC, based on a combination of the astronomical evidence considered by David Pankenier and radiocarbon dating of archaeological layers.
 * David Nivison and Edward Shaughnessy argue for an end date of 1045 BC, based on their analysis of the Bamboo Annals.
 * Radiocarbon dating of oracle bones has yielded an end date of 1041 BC, with an uncertainty of about 10 years.

Late Shang at Anyang
The oldest extant direct records date from approximately 1250 BC at Anyang, covering the reigns of the last nine Shang kings. The Shang had a fully developed system of writing, preserved on bronze inscriptions and a small number of other writings on pottery, jade and other stones, horn, etc., but most prolifically on oracle bones. The complexity and sophistication of this writing system indicates an earlier period of development, but direct evidence of such is still lacking. Other advances included the invention of many musical instruments and celestial observations of Mars and various comets by Shang astronomers.

Their civilization was based on agriculture and augmented by hunting and animal husbandry. In addition to war, the Shang also practised human sacrifice. Skulls of sacrificial victims have been found to be similar to modern Chinese ones (based on comparisons with remains from Hainan and Taiwan). Cowry shells were also excavated at Anyang, suggesting trade with coast-dwellers, but there was very limited sea trade since China was isolated from other large civilizations during the Shang period. Trade relations and diplomatic ties with other formidable powers via the Silk Road and Chinese voyages to the Indian Ocean did not exist until the reign of Emperor Wu during the Han dynasty (202 BC – 221 AD).

Court life
At the excavated royal palace in Yinxu, large stone pillar bases were found along with rammed earth foundations and platforms, which according to Fairbank, were "as hard as cement". These foundations in turn originally supported 53 buildings of wooden post-and-beam construction. In close proximity to the main palatial complex, there were underground pits used for storage, servants' quarters, and housing quarters.

Many Shang royal tombs had been tunnelled into and ravaged by grave robbers in ancient times, but in the spring of 1976, the discovery of Tomb 5 at Yinxu revealed a tomb that was not only undisturbed, but one of the most richly furnished Shang tombs that archaeologists had yet come across. With over 200 bronze ritual vessels and 109 inscriptions of Fu Hao's name, Zheng Zhenxiang and other archaeologists realized they had stumbled across the tomb of Fu Hao, Wu Ding's most famous consort also renowned as a military general, and mentioned in 170 to 180 oracle bone inscriptions. Along with bronze vessels, stoneware and pottery vessels, bronze weapons, jade figures and hair combs, and bone hairpins were found. The archaeological team argue that the large assortment of weapons and ritual vessels in her tomb correlate with the oracle bone accounts of her military and ritual activities.

The capital was the centre of court life. Over time, court rituals to appease spirits developed, and in addition to his secular duties, the king would serve as the head of the ancestor worship cult. Often, the king would even perform oracle bone divinations himself, especially near the end of the dynasty. Evidence from excavations of the royal tombs indicates that royalty were buried with articles of value, presumably for use in the afterlife. Perhaps for the same reason, hundreds of commoners, who may have been slaves, were buried alive with the royal corpse.

A line of hereditary Shang kings ruled over much of northern China, and Shang troops fought frequent wars with neighbouring settlements and nomadic herdsmen from the inner Asian steppes. The Shang king, in his oracular divinations, repeatedly showed concern about the barbarians living outside of the civilized regions, which made up the centre of Shang territory. In particular, the group living in the Yan Mountains were regularly mentioned as hostile to the Shang.

Apart from their role as the head military commanders, Shang kings also asserted their social supremacy by acting as the high priests of society and leading the divination ceremonies. As the oracle bone texts reveal, the Shang kings were viewed as the best qualified members of society to offer sacrifices to their royal ancestors and to the high god Di, who in their beliefs was responsible for the rain, wind, and thunder.

The King appointed officials to manage certain activities, usually in a specified region. These included agricultural official, pastors, dog officers, and guards. These officers led their own retinues in the conduct of their duties, and some grew more independent and emerged as rulers of their own. There was a basic system of bureaucracy in place, with references to positions such as the "Many Dog officers", "Many horse officers", the "Many Artisans", the "Many Archers" or court titles like "Junior Servitor for Cultivation" or "Junior Servitor for labourers". Members of the royal family would be assigned personal estates; the king provided them with pre-determined public works such as walling cities in their regions, distributed materials and issued commands to them. In turn, their estates belonged ultimately to the king's land, and they paid tribute to the king as well as reporting to him about conquered lands. More distant rulers were known as marquess or count, who sometimes provided tribute and support to the Shang King in exchange for military aid and augury services. However these alliances were unstable, as indicated by the frequent royal divinations about the sustainability of such relations.

The existence of records regarding enemy kills, prisoners and booty taken point to the existence of a proto-bureaucracy of written documents.

Religion
Shang religious rituals featured divination and sacrifice. The degree to which shamanism was a central aspect of Shang religion is a subject of debate.

There were six main recipients of sacrifice:
 * Di, the "High God",
 * 1) Natural forces, such as that of the sun and mountains,
 * 2) Former lords, deceased humans who had been added to the dynastic pantheon,
 * 3) Pre-dynastic ancestors,
 * 4) Dynastic ancestors, and
 * 5) Royal wives who were ancestors of the present king

The Shang believed that their ancestors held power over them and performed divination rituals to secure their approval for planned actions. Divination involved cracking a turtle carapace or ox scapula to answer a question, and to then record the response to that question on the bone itself. It is unknown what criteria the diviners used to determine the response, but it is believed to be the sound or pattern of the cracks on the bone.

The Shang also seem to have believed in an afterlife, as evidenced by the elaborate burial tombs built for deceased rulers. Often "carriages, utensils, sacrificial vessels, [and] weapons" would be included in the tomb. A king's burial involved the burial of up to a few hundred humans and horses as well to accompany the king into the afterlife, in some cases even numbering four hundred. Finally, tombs included ornaments such as jade, which the Shang may have believed to protect against decay or confer immortality.

The Shang religion was highly bureaucratic and meticulously ordered. Oracle bones contained descriptions of the date, ritual, person, ancestor, and questions associated with the divination. Tombs displayed highly ordered arrangements of bones, with groups of skeletons laid out facing the same direction.

Bronze working
Chinese bronze casting and pottery advanced during the Shang, with bronze typically being used for ritually significant, rather than primarily utilitarian, items. As early as c. 1500 BC, the early Shang dynasty engaged in large-scale production of bronzeware vessels and weapons. This production required a large labour force that could handle the mining, refining, and transportation of the necessary copper, tin, and lead ores. This in turn created a need for official managers that could oversee both labourers and skilled artisans and craftsmen. The Shang royal court and aristocrats required a vast number of different bronze vessels for various ceremonial purposes and events of religious divination. Ceremonial rules even decreed how many bronze containers of each type a noble of a certain rank could own. With the increased amount of bronze available, the army could also better equip itself with an assortment of bronze weaponry. Bronze was also used for the fittings of spoke-wheeled chariots, which appeared in China around 1200 BC.

Military

The Shang dynasty entered into prolonged conflicts with northern frontier tribes called the Guifang.

Bronze weapons were an integral part of Shang society. Shang infantry were armed with a variety of stone and bronze weaponry, including spears, pole-axes, pole-based dagger-axes, composite bows, and bronze or leather helmets.

Although the Shang depended upon the military skills of their nobility, Shang rulers could mobilize the masses of town-dwelling and rural commoners as conscript labourers and soldiers for both campaigns of defence and conquest. Aristocrats and other state rulers were obligated to furnish their local garrisons with all necessary equipment, armour, and armaments. The Shang king maintained a force of about a thousand troops at his capital and would personally lead this force into battle. A rudimentary military bureaucracy was also needed in order to muster forces ranging from three to five thousand troops for border campaigns to thirteen thousand troops for suppressing rebellions.

Kings
The earliest records are the oracle bones inscribed during the reigns of the Shang kings from Wu Ding. The oracle bones do not contain king lists, but they do record the sacrifices to previous kings and the ancestors of the current king, which follow a standard schedule that scholars have reconstructed. From this evidence, scholars have assembled the implied king list and genealogy, finding that it is in substantial agreement with the later accounts, especially for later kings. According to this implied king list, Wu Ding was the twenty-first Shang king.

The Shang kings were referred to in the oracle bones by posthumous names. The last character of each name is one of the 10 celestial stems, which also denoted the day of the 10-day Shang week on which sacrifices would be offered to that ancestor within the ritual schedule. There were more kings than stems, so the names have distinguishing prefixes such as da ('greater', ), zhong ('middle', ), xiao ('lesser', ), bu ('outer', ), and zu ('ancestor', ), as well as other, more obscure ones.

The kings, in the order of succession derived from the oracle bones, are here grouped by generation. Later reigns were assigned to oracle bone diviner groups by Dong Zuobin.

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title: Shang dynasty


text:
Xia dynasty

The Xia dynasty is the first dynasty in traditional Chinese historiography. According to tradition, it was established by the legendary figure Yu the Great, after Shun, the last of the Five Emperors, gave the throne to him. In traditional historiography, the Xia was succeeded by the Shang dynasty.

There are no contemporaneous records of the Xia, who are not mentioned in the oldest Chinese texts, since the earliest oracle bone inscriptions date from the Late Shang period (13th century BC). The earliest mentions occur in the oldest chapters of the Book of Documents, which report speeches from the early Western Zhou period and are accepted by most scholars as dating from that time. The speeches justify the Zhou conquest of the Shang as the passing of the Mandate of Heaven and liken it to the succession of the Xia by the Shang. That political philosophy was promoted by the Confucian school in the Eastern Zhou period. The succession of dynasties was incorporated into the Bamboo Annals and the Records of the Grand Historian and became the official position of imperial historiography and ideology. Some scholars consider the Xia dynasty legendary or at least unsubstantiated, but others identify it with the archaeological Erlitou culture.

According to the traditional chronology, based upon calculations by Liu Xin, the Xia ruled between 2205 and 1766 BC. According to the chronology based on the "current text" Bamboo Annals, it ruled between 1989 and 1558 BC. Comparing the same text with dates of five-planet conjunctions, David Pankenier, supported by David Nivison, proposed dates of 1953 and 1555 BC. The Xia–Shang–Zhou Chronology Project, commissioned by the Chinese government in 1996, proposed that the Xia existed between 2070 and 1600 BC.

Traditional history
The Xia dynasty was described in several Chinese classics, including the Book of Documents, the Bamboo Annals, and Sima Qian's Records of the Grand Historian. According to tradition, the Huaxia people who populated the Xia represent the direct ancestors of the Han Chinese.

Origins and early development
Traditional histories trace the development of the Xia to the mythical Three Sovereigns and Five Emperors. According to ancient Chinese texts, before the Xia dynasty was established, battles were frequent between Yellow Emperor's tribe and Chiyou's tribe. The Records of the Grand Historian and Book of Rites say that Yu the Great, the founder of the Xia dynasty, was the grandson of Zhuanxu, who was the grandson of the Yellow Emperor. But there are also other records, like Ban Gu's, that say Yu's father is a fifth generation descendant of Zhuanxu. Other sources such as Classic of Mountains and Seas mention Yu's father Gun was the son of Luoming, who was the son of the Yellow Emperor. Sima Qian traced the origin of the dynasty to the name of a fief granted to Yu, who would use it as his own surname and his state's name.

Gun, Yu, and the flood
Gun, the father of Yu the Great, is the earliest recorded member of the Xia clan. When the Yellow River flooded, many tribes united together to control and stop the flooding. Gun was appointed by Emperor Yao to stop the flooding. He ordered the construction of large levees to block the path of the water. The attempts of Gun to stop the flooding lasted for nine years, but ultimately failed because the floods strengthened. After nine years, Yao had already given his throne to Shun. Gun was ordered to be imprisoned for life by Shun at Yushan (, 'Feather Mountain'), a mountain located between modern Donghai County in Jiangsu, and Linshu County in Shandong.

Yu was highly trusted by Shun, so Shun appointed him to finish his father's work, which was to stop the flooding. Yu's method was different from his father's: he organized people from different tribes and ordered them to help him build canals in all the major rivers that were flooding and lead the water out to the sea. Yu was dedicated to his work. The populace praised his perseverance and were inspired, so much so that other tribes joined in the work. Legend says that in the 13 years it took him to successfully complete the work to stop the floods, he never went back to his home village to stop and rest, even though he passed by his house three times.

Establishment
Yu's success in stopping the flooding increased agricultural production. The Xia tribe's power increased and Yu became the leader of the surrounding tribes. Soon afterwards Shun sent Yu to lead an army to suppress the Sanmiao tribe, which continuously abused the border tribes. After defeating them, he exiled them south to the Han River area. This victory strengthened the Xia tribe's power even more. As Shun aged, he thought of a successor and relinquished the throne to Yu, whom he deemed worthy. Yu's succession marks the start of the Xia dynasty. As Yu neared death he passed the throne to his son, Qi, instead of passing it to the most capable candidate, thus setting the precedent for dynastic rule or the Hereditary System. The Xia dynasty began a period of family or clan control. It is believed that Zhenxun (modern Gongyi) and Yangcheng (modern Gaocheng) were two of the capitals of the dynasty.

Interregnum
The third Xia king was Tai Kang, described as an avid hunter but ineffective ruler. The Bamboo Annals describe the Xia capital at Zhenxun being attacked by Hou Yi while Tai Kang was on a hunt beyond the Luo River. The occupation of Zhenxun marked the beginning of a significant interregnum. In the eighth year of the reign of Tai Kang's nephew Xiang, Hou Yi was killed by his former chief minister Han Zhuo. 20 years later, Han Zhuo's forces killed King Xiang and usurped the throne, but the royal family escaped.

Xiang's son Shao Kang was sheltered by a tribal chief, surviving for years as a fugitive despite the efforts of Han Zhuo to eliminate him and prevent any reemergence of the Xia. Upon reaching adulthood, Shao Kang began organizing with local lords who hated Han Zhuo's rule. Shao Kang emerged victorious in the military confrontation that followed, and Han Zhuo committed suicide. The reign of Shao Kang and his son Zhu is traditionally characterized as one of the most prosperous periods in the Xia's history.

Overthrow
Jie was the final King of Xia—he was said to be immoral, lascivious, and tyrannical. He was overthrown by Tang, who inaugurated the new Shang dynasty. King Tang is said to have given the remnants of the Xia clan a fief comprising the small state of Qi. This practice was referred to as "the two crownings and the three respects".

Nine Provinces
According to the Book of Documents, Yu the Great divided his state into nine provinces (九州). These are Ji (冀), Yan (兗), Qing (青), Xu (徐), Yang (揚), Jing (荊), Yu (豫), Liang (梁) and Yong (雍). Each province was briefly described by the Book of Documents in terms of their soil quality, their productivity and other geographical characteristics. According to the chapter "Tribute of Yu" in the text, the Nine Provinces respectively correspond to modern regions of China as:
 * Ji Province corresponds to modern Hebei, Shanxi and a part of Liaoning;
 * Yan Province corresponds to parts of Shandong and Hebei;
 * Qing Province corresponds to the part of Shandong to the east of Mount Tai;
 * Xu Province corresponds to northern parts of Jiangsu, Anhui, and the southern parts of Shandong;
 * Yang Province corresponds to southern Jiangsu, southern Anhui, northern Zhejiang, and northern Jiangxi;
 * Jing Province corresponds to parts of Hunan, and northwestern Jiangxi;
 * Yu Province corresponds to Henan, northern Hubei, southeastern Shaanxi, and southwestern Shandong;
 * Liang Province corresponds to Sichuan, southern Gansu, and Shaanxi;
 * Yong Province corresponds to parts of Shaanxi, Gansu, Ningxia, and Qinghai.

Capital cities
The Xia dynasty moved the capital many times. According to traditional records, these capitals are as follows:

Fangguo tribes
According to traditional Chinese records, the fangguo tribes were polities outside the Xia clan's direct rule. They were mostly large tribal peoples, but some were massive enough to become small states with more complex social structures, rivaling that of the Xia. Many of the tribes were described as in regular relationships with the Xia court, being either allies or enemies. Eventually, some of the tribal chiefs joined the force of Tang to overthrow Jie's regime.

Geopolitical system
During the Xia, the scope of direct jurisdiction of the state is limited to within the clan. Beyond the Xia's own tribe, other tribal leaders enjoyed relatively independent management and ruling rights in their own territories; for the Xia Hou, they expressed their mutual relations in the form of submission and tribute. The Book of Documents says that Yu the Great determined the relationships between Xia and Fangguo tribes, dividing them into 5 categories according to the tribes' relative locations from the Xia clan's residence: "He [Yu] conferred lands and surnames. (He said), 'Let me set the example of a reverent attention to my virtue, and none will act contrary to my conduct, Five hundred li formed the Domain of the Sovereign. From the first hundred they brought as revenue the whole plant of the grain; from the second, the cars, with a portion of the stalk; from the third, the straw, but the people had to perform various services; from the fourth, the grain in the husk; and from the fifth, the grain cleaned.

Five hundred li (beyond) constituted the Domain of the Nobles. The first hundred li was occupied by the cities and lands of the (sovereign's) high ministers and great officers; the second, by the principalities of the barons; and the (other) three hundred, by the various other princes.

Five hundred li (still beyond) formed the Peace−securing Domain. In the first three hundred, they cultivated the lessons of learning and moral duties; in the other two, they showed the energies of war and defence.

Five hundred li (remoter still) formed the Domain of Restraint. The (first) three hundred were occupied by the tribes of the Yi; the (other) two hundred, by criminals undergoing the lesser banishment.

Five hundred li (the most remote) constituted the Wild Domain. The (first) three hundred were occupied by the tribes of the Man; the (other) two hundred, by criminals undergoing the greater banishment."

Texts like the Book of Documents, the Book of Rites, and the Mencius describe that the Xia had already established a distinguished official system with positions helping the Xia clan in managing the state. There were also laws set forth to maintain social stability within the country.

Economic status
Traditional narratives describe the Xia as enjoying prosperity in agriculture. The Analects contends that Yu the Great devoted himself to irrigation, improving the drainage system for cultivating crops. The texts also say that the people of Xia was gifted in producing alcohol, with the notable legendary figure of Du Kang who is usually identified with Shao Kang. The population was described to have had vegetables and rice as the staple crop, and meat was usually reserved for sacrifices. Additionally, manufacture of goods and trade with outside tribes flourished. The site at Erlitou contains many metallic fragments, suggesting that the time assigned to the Xia was characterized by bronze metallurgy.

During Yu the Great's controlling of the floods, he renewed the transportation system. Sima Qian wrote in his Records of the Grand Historian that Yu used carriages to travel on land, boats to travel on rivers, sleds to travel on mud, and horses to cross the mountains. He surveyed the lands and opened up routes through geographical locations so that tributes from tribal chiefs to the Xia would be more convenient. He organized people to build roads connecting the Nine Provinces, helping to improve tributary and economic relations between the tribes. Traditional texts record that the transport system of the Xia clan extended at least 500 – 600 li horizontally and 300 – 400 li vertically. The Guoyu also records that the Xia dynasty ordered the roads to be opened up in the 9th month, the bridges to be finished in the 10th month.

Population estimates
The calculation of the Xia dynasty's population attracted interests during the Han dynasty. However, all calculations are speculations and extrapolations, due to difficulties stemming from time intervals. The Book of the Later Han quotes Huangfu Mi's work Diwang Shiji, which claims that when Yu the Great finished establishing the Nine Provinces, the total population was 13,553,923 individuals, however, this number is highly speculative because Huangfu Mi reached his conclusion by extrapolating from demographic statuses of the Qin, Han, Jin dynasties. Modern Chinese scholars estimated the Xia's population by employing records from ancient texts. Records have it that when Tai Kang established Lun as his capital, the settlement had about one lu, which was 500 people according to Du Yu, and this number includes only soldiers. Modifying the figures and adding other types of people, Song Zhenhao postulated that this supposed city had between 1500 and 2500 individuals by the time of Tai Kang, a number he classified as medium. Estimating the number of populous cities, Song finally calculated the result of over 2 million. Wang Yumin, using description of demography during the reign of Emperor Shun who directly preceded the Xia, concluded that the population of the dynasty was around 2.1 million.

Modern studies

The time gap between the supposed time of the Xia and the first written references to it have meant that the historicity of the Xia dynasty itself and the traditional narrative of its history are at best uncertain. The Doubting Antiquity School led by Gu Jiegang in the 1920s were the first scholars within China to systematically question the traditional story of its early history. By critically examining the development of the narrative of early Chinese history throughout history, Gu concluded, "the later the time, the longer the legendary period of earlier history [...] early Chinese history is a tale told and retold for generations, during which new elements were added to the front end".

Some historians have suggested that the Zhou rulers invented the Xia as a pretext, to justify their conquest of the Shang, by noting that just as the Shang had supplanted the Xia, they had supplanted the Shang. The existence of the Xia remains unproven, despite efforts by Chinese archaeologists to link them with the Bronze Age Erlitou culture.

Among other points, Gu and other historians note certain parallels between the traditional narrative of Xia history and Shang history that would suggest probable Zhou-era fabrication or at least embellishment of Xia history. Yun Kuen Lee's criticism of nationalist sentiment in developing an explanation of Three Dynasties chronology focuses on the dichotomy of evidence provided by archaeological versus historical research, in particular, the claim that the archaeological Erlitou culture is also the historical Xia dynasty. "How to fuse the archaeological dates with historical dates is a challenge to all chronological studies of early civilization."

In The Shape of the Turtle: Myth, Art, and Cosmos in Early China, Sarah Allan noted that many aspects of the Xia are simply the opposite of traits held to be emblematic of the Shang. The implied dualism of the Shang myth system, Allan argues, is that while the Shang represent the suns, sky, birds, east and life, the Xia represent the moons, watery underworld, dragons, west and death. Allan argues that this mythical Xia was re-interpreted by the Zhou as a ruling dynasty replaced by the Shang, a parallel with their own replacement of the Shang.

Other scholars also argue that Shang political class's remnants still existed during the early Zhou dynasty, Zhou rulers could not simply justify their succession to pacify Shang remnants if it's entirely fabricated since the Shang remnants, who remembered prior histories, would not believe it in the first place. For example, the Classic of Poetry preserves the "Eulogies of Shang" (商頌 Shāng sòng) which represents the powerful state of Song, whose rulers were the direct descendants of Shang dynasty. Among those eulogies, the eulogy Chang Fa celebrated victories by the "martial king" Tang of Shang against Wei, Gu , Kunwu , and Jie of Xia. During the later Song dynasty (960–1279 AD), an ancient bronze artifact, Shu Yi Zhong, was unearthed with an inscription describing how the founder of the Shang dynasty, Tang, overthrew the Xia dynasty. Shu Yi, the owner of this artifact, was a high officer of the state of Qi during the Spring and Autumn period (c. 600 BC), was actually a direct descendant of the Song rulers, which means he himself was a descendant of Shang people. This bronze artifact was used to memorialize his Shang ancestors. The inscription contradicts the hypothesis that the Zhou manufactured the existence of the Xia.

Although the Shang oracle bone inscriptions contain no mention of the Xia, some scholars have suggested that polities they mention might be remnants of the Xia. Guo Moruo suggested that an enemy state called Tufang state of the Fang states mentioned in many inscriptions might be identified with the Xia. Historian Shen Changyun points to four inscriptions mentioning Qi, the same name as the state of Qi, which according to traditional accounts was established by the defeated royal house of Xia.

Archaeological discoveries
Inspired by the discovery of the late Shang capital (Yinxu) near modern Anyang, Chinese archaeologists searched the Yellow River basin for earlier capitals. In 1959, Xu Xusheng conducted a survey of the Yi–Luo basin, which he had identified from received texts as a possible location of Xia capitals. Among his discoveries was the large Bronze Age site of Erlitou near modern Yanshi. The site was an urban centre, with rammed-earth foundations of several buildings, which were interpreted as palaces or temples. Radiocarbon dating in the late 20th century had wide error margins, and placed the Erlitou culture between 2100 and 1300 BC, which fit well with the traditional dates of the Xia. Most Chinese archaeologists identify the Xia with Erlitou, while many western archaeologists argue that the identification, and indeed the very existence of Xia, is unprovable, due to the lack of testable detail in the traditional accounts. For a time, archaeologists debated which of the four phases of Erlitou should be interpreted as Xia and which as Shang.

The refined dating techniques used by the Xia–Shang–Zhou Chronology Project produced a narrower range for the Erlitou culture of 1880 to 1520 BC. The project assigned all four phases of Erlitou to the Xia, and identified the transition to the Shang with the construction of walled cities at Yanshi and Zhengzhou around 1600 BC. Since the project had settled on a start date for the Xia of 2070 BC, based on received texts, this forced them to designate the late part of the Henan Longshan culture, including the Xinzhai phase, as the early part of the Xia period. No corresponding cultural transition in the archaeological record has yet been discovered. Even more refined carbon dating in 2005 and 2006 produced more tightly defined ranges, dating Xinzhai at 1870–1720 BC and Erlitou at 1735–1530 BC.

The only musical instruments found at Erlitou are a qing sounding stone, two small clapper bells (one earthenware, one bronze) and a xun with one finger hole. Due to this extreme scarcity of surviving instruments and the general uncertainty surrounding most of the Xia, creating a musical narrative of the period is impractical.

Archaeological evidence of a large outburst flood at Jishi Gorge that destroyed the Lajia site on the upper reaches of the Yellow River has been dated to. This date is shortly before the rise of the Erlitou culture in the middle Yellow River valley and the Yueshi culture in Shandong, following the decline of the Longshan culture in the North China Plain. The authors suggest that this flood may have been the basis for the later myth of Yu the Great, and contributed to the cultural transition into the Erlitou period. They further argue that the timing is further evidence for the identification of the Xia with the Erlitou culture. However, no evidence of contemporaneous widespread flooding in the North China Plain has yet been found.

The Cambridge History of Ancient China (1999) takes the beginning of Chinese history as the Xia's successor Shang dynasty (c. 1600). Xie Weiyang responded to this standpoint unfavorably towards efforts in China to link archaeological research to historical records: "The Cambridge History of Ancient China adopted this standpoint with the promise of providing a commonly accepted synthesis based on an exhaustive discussion of the latest pre-Qin material available at the end of the 1990s. This is of extraordinary significance, because if this book aims to provide a commonly accepted synthesis, then the blood, sweat, and tears of Chinese scholars over the past decade that brought about countless achievements in Xia period research will become a joke, and many Chinese scholars in the field will lose all sense of direction and not know how to get back on the right track."

However, as Chen Chun and Gong Xin point out, the debate upon the Xia dynasty's historical existence stems from different research orientations between Chinese and Western scholars. The authors assert that overseas scientific communities are hesitant to accept the results of Chinese researchers because their studies used traditional narratives of the Xia as a guide that instructed them on what to find, and because they quickly linked newly discovered artifacts, constructions and other evidences as representing the proof for the Xia's actual existence. They claim that mainland Chinese scholars focused mainly on extrapolations of excavated evidence to establish a historical perspective, and overlooked other complex factors in ancient human activities. This method, according to the two authors, resulted in high levels of subjectivity and contradicted the common trend among Western researchers, which took the physical discoveries as not necessarily representing real social or political units.

Sovereigns
The following table lists the rulers of Xia according to the Records of the Grand Historian. Unlike Sima's list of Shang kings, which is closely matched by inscriptions on oracle bones from late in that period, records of Xia rulers have not yet been found in archaeological excavations of contemporary sites, or records on later Shang dynasty oracle bones.

title: Xia dynasty