Four Barbarians in the context of Hu (people)

Zhongyuan (Chinese: 中原; pinyin: Zhōngyuán), the Central Plain(s), also known as Zhongtu (Chinese: 中土; pinyin: Zhōngtǔ, lit. 'central land') and Zhongzhou (Chinese: 中州; pinyin: Zhōngzhōu, lit. 'central region'), commonly refers to the part of the North China Plain surrounding the lower and middle reaches of the Yellow River, centered on the region between Luoyang and Kaifeng. It has been perceived as the birthplace of the Chinese civilization. Historically, the Huaxia people viewed Zhongyuan as 'the center of the world'. Human activities in the Zhongyuan region can be traced back to the Palaeolithic period.

In prehistoric times, Huaxia, a confederation of tribes that later developed into the Han ethnicity, lived along the middle and lower reaches of the Yellow River. The term 'Zhongguo' (Central State) was used to distinguish themselves from the Siyi tribes that were perceived as 'barbaric'. For a large part of Chinese history, Zhongyuan had been the political, economic, and cultural center of the Chinese civilization, as over 20 dynasties had located their capitals in this region.

Sinocentrism refers to a worldview that China is the cultural, political, or economic center of the world. Sinocentrism was a core concept in various Chinese dynasties. The Chinese considered themselves to be "all-under-Heaven", ruled by the emperor, known as Son of Heaven. Those that lived outside of the Huaxia were regarded as "barbarians". In addition, states outside of China, such as Vietnam, Japan or Korea, were considered to be vassals of China.

Xirong (Chinese: 西戎; pinyin: Xīróng; Wade–Giles: Hsi-jung; lit. 'Western warlike people') or Rong were various people who lived primarily in and around the western extremities of ancient China (in modern Gansu and Qinghai). They were known as early as the Shang dynasty (1765–1122 BCE), as one of the Four Barbarians that frequently (and often violently) interacted with the sinitic Huaxia civilization. They typically resided to the west of Guanzhong Plains from the Zhou dynasty (1046–221 BCE) onwards. They were mentioned in some ancient Chinese texts as perhaps genetically and linguistically related to the people of the Chinese civilization.

The Predynastic Zhou or Proto-Zhou (/dʒoʊ/; Chinese: 先周) refers to the ancient Chinese state ruled by the Ji clan that existed in the Guanzhong region (modern central Shaanxi province) during the Shang dynasty, before its rebellion and subsequent conquest of the Shang in 1046-1045 BC led to the establishment of the Zhou dynasty. According to histories, predynastic Zhou rose as a western frontier vassal state of the Shang, acting as its ally against the Xirong barbarians until their influence surpassed that of the Shang dynasty.

Records about predynastic Zhou came from two sources. The Shang dynasty kept records about Zhou in oracle bones. The texts about Zhou inscribed by the Shang court are mainly those from the reign of Wu Ding and the last Shang monarchs. After the fall of Shang, the Ji clan established the Zhou dynasty and started their own narrative about previous generations. The Book of Documents and the Bamboo Annals are two major historical sources. Later, Sima Qian wrote about the country using those texts as reference.