Xia Dynasty

Sima Qian's account dates the founding of the Xia Dynasty (夏朝) to 4,000 years ago, but this date has not been corroborated. Some archaeologists connect the Xia to excavations at Erlitou in central Henan province, where a bronze smelter from around 2000 BC was unearthed. Early markings from this period, found on pottery and shells, have been alleged to be ancestors of modern Chinese characters, but such claims are controversial.

Proof of Xia's existence still requires further archaeological discovery. With no clear written records to match the Shang oracle bones or the Zhou bronze vessel writings, the Xia era remains poorly understood. Most modern knowledge about the Xia dynasty is speculation based on what is known about later periods.

Shang Dynasty

The earliest written record of China's past dates from the Shang Dynasty (商朝) in perhaps the 13th century BC, and takes the form of inscriptions of divination records on the bones or shells of animals�the so-called oracle bones (甲骨文). Archaeological findings providing evidence for the existence of the Shang Dynasty, c 1600�1046 BC is divided into two sets.

The first set, from the earlier Shang period (c 1600�1300) comes from sources at Erligang (二里崗), Zhengzhou (鄭州) and Shangcheng. The second set, from the later Shang or Yin (殷) period, consists of a large body of oracle bone writings. Anyang (安陽) in modern day Henan has been confirmed as the last of the nine capitals of the Shang (c 1300�1046 BC).

Chinese historians living in later periods were accustomed to the notion of one dynasty succeeding another, but the actual political situation in early China is known to have been much more complicated. Hence, as some scholars of China suggest, the Xia and the Shang can possibly refer to political entities that existed concurrently, just as the early Zhou (successor state of the Shang), is known to have existed at the same time as the Shang.

Zhou Dynasty

By the end of the 2nd millennium BC, the Zhou Dynasty (周朝) began to emerge in the Yellow River valley, overrunning the Shang. The Zhou appeared to have begun their rule under a semi-feudal system. The ruler of the Zhou, King Wu, with the assistance of his uncle, the Duke of Zhou, as regent managed to defeat the Shang at the Battle of Muye.

The king of Zhou at this time invoked the concept of the Mandate of Heaven to legitimize his rule, a concept that would be influential for almost every successive dynasty. The Zhou initially moved their capital west to an area near modern Xi'an, near the Yellow River, but they would preside over a series of expansions into the Yangtze River valley. This would be the first of many population migrations from north to south in Chinese history.

Spring and Autumn Period

In the 8th century BC, power became decentralized during the Spring and Autumn Period (春秋時代), named after the influential Spring and Autumn Annals. In this period, local military leaders used by the Zhou began to assert their power and vie for hegemony.

The situation was aggravated by the invasion of other peoples from the northwest, such as the Qin, forcing the Zhou to move their capital east to Luoyang. This marks the second large phase of the Zhou dynasty: the Eastern Zhou. In each of the hundreds of states that eventually arose, local strongmen held most of the political power and continued their subservience to the Zhou kings in name only. Local leaders for instance started using royal titles for themselves.

The Hundred Schools of Thought (諸子百家) of Chinese philosophy blossomed during this period, and such influential intellectual movements as Confucianism (儒家), Taoism (道家), Legalism (法家) and Mohism (墨家) were founded, partly in response to the changing political world. The Spring and Autumn Period is marked by a falling apart of the central Zhou power. China now consists of hundreds of states, some only as large as a village with a fort.

Warring States Period

After further political consolidation, seven prominent states remained by the end of 5th century BC, and the years in which these few states battled each other is known as the Warring States Period (戰國時代). Though there remained a nominal Zhou king until 256 BC, he was largely a figurehead and held little real power.

As neighboring territories of these warring states, including areas of modern Sichuan (四川)and Liaoning (遼寧), were annexed, they were governed under the new local administrative system of commandery and prefecture (郡縣). This system had been in use since the Spring and Autumn Period and parts can still be seen in the modern system of Sheng & Xian (province and county, 省縣).

The final expansion in this period began during the reign of Ying Zheng (嬴政), the king of Qin. His unification of the other six powers, and further annexations in the modern regions of Zhejiang (浙江), Fujian (福建), Guangdong (廣東) and Guangxi (廣西) in 214 BC enabled him to proclaim himself the First Emperor (Qin Shi Huangdi, 秦始皇帝).