Zhao (state) in the context of "Partition of Jin"

Qin Shi Huang (Chinese: 秦始皇, Qín Shǐ Huáng, pronunciation; February 259 – 12 July 210 BC) was the founder of the Qin dynasty and the first emperor of China. Rather than maintain the title of "king" (wáng 王) borne by the previous Shang and Zhou rulers, he assumed the invented title of "emperor" (huángdì 皇帝), which would see continuous use by monarchs in China for the next two millennia.

Born in Handan, the capital of Zhao, as Ying Zheng (嬴政) or Zhao Zheng (趙政), his parents were King Zhuangxiang of Qin and Lady Zhao. The wealthy merchant Lü Buwei assisted him in succeeding his father as the king of Qin, after which he became King Zheng of Qin (秦王政). By 221 BC, he had conquered all the other warring states and unified all of China, and he ascended the throne as China's first emperor. During his reign, his generals greatly expanded the size of the Chinese state: campaigns south of Chu permanently added the Yue lands of Hunan and Guangdong to the Sinosphere, and campaigns in Inner Asia conquered the Ordos Plateau from the nomadic Xiongnu, although the Xiongnu later rallied under Modu Chanyu.

Qin's wars of unification were a series of military campaigns launched in the late third century BC by the state of Qin against the other six states remaining in China – Han, Zhao, Yan, Wei, Chu and Qi. Between 247 and 221 BC, Qin had developed into the most powerful of China's Seven Warring States that coalesced in the wake of the declining Zhou dynasty, which had been reduced to a weak and merely ceremonial position during the Warring States period. In 230 BC, Ying Zheng, the King of Qin, began the sequence of campaigns that would bring the Warring States period to a close, setting out to conquer each of the six states one by one. This was completed in 221 BC with the fall of Qi, which further led to a more centralised form of government replacing the fengjian system of the Zhou dynasty. Ying Zheng declared himself the First Emperor – or Shi Huangdi – of a unified China under the Qin dynasty.

Xunzi (荀子, Xúnzǐ, lit. 'Master Xun'; c. 310 – c. after 238 BCE), born Xun Kuang, was a Chinese philosopher of Confucianism during the late Warring States period. After his predecessors Confucius and Mencius, Xunzi is often ranked as the third great Confucian philosopher of antiquity. By his time, Confucianism had suffered considerable criticism from Taoist and Mohist thinkers, and Xunzi is traditionally regarded as a synthesizer of these traditions with earlier Confucian thought. The result was a thorough and cohesive revision of Confucianism, which was crucial to the philosophy's ability to flourish in the Han dynasty and throughout the later history of East Asia. His works were compiled in the eponymous Xunzi, and survive in excellent condition. Unlike other ancient compilations, his authorship of these texts is generally secure, though it is likely that Western Han dynasty historian Liu Xiang organized them into their present form centuries after Xunzi's death.

Born in the state of Zhao, Xunzi studied at the prestigious Jixia Academy, where he learned about every major philosophical tradition of his time. After his graduation, Xunzi traveled to Chu where he mastered poetry, and then returned to Qi as a highly regarded teacher at the academy. His students Han Fei and Li Si each had important political and academic careers, though some of their Legalist sentiments were at odds with his philosophy. Other students such as Fuqiu Bo [zh], Zhang Cang and Mao Heng [zh] authored important editions and commentaries on the Confucian classics. Later in his life, Xunzi served in the court of Lord Chunshen and died sometime after Lord Chunshen's death. The constant warfare of his time informed his work profoundly, as did his interactions with leaders and witnessing the downfall of various states.

Lü Buwei (291–235 BCE) was a Chinese merchant and politician of the Qin state during the Warring States period. Originally an influential merchant from the Wey (衛) state, Lü Buwei met and befriended King Zhuangxiang of Qin, who was then a minor prince serving as a hostage in the Zhao state. Through bribes and machinations, Lü Buwei succeeded in helping King Zhuangxiang become the heir apparent to the Qin throne. In 249 BCE, after King Zhuangxiang ascended the throne following the death of his father, King Xiaowen, he appointed Lü Buwei as his chancellor (相國) and ennobled him as "Marquis Wenxin" (文信侯). After King Zhuangxiang's death in 247 BCE, Lü Buwei became the chancellor and regent to King Zhuangxiang's young son, Ying Zheng, who later became Qin Shi Huang (First Emperor of the Qin dynasty).

In 235 BCE, after being implicated in a scandal involving the Queen Dowager Zhao (Ying Zheng's mother) and her illicit lover Lao Ai, Lü Buwei was stripped of his posts and titles and was banished to the remote Shu region in the south of Qin. While in exile, Lü Buwei committed suicide by consuming poison.

The Seven Warring States or Seven Kingdoms (traditional Chinese: 戰國七雄; simplified Chinese: 战国七雄; pinyin: zhàn guó qī xióng) were the seven leading hegemonic states during the Warring States period (c. 475 to 221 BC) of ancient China:

• Han (韓/韩), defeated by Qin in 230 BCE
• Zhao (趙/赵), defeated by Qin in 228 BCE
• Wei (魏), defeated by Qin in 225 BCE
• Chu (楚), defeated by Qin in 223 BCE
• Yan (燕), defeated by Qin in 222 BCE
• Qi (齊/齐), defeated by Qin in 221 BCE
• Qin (秦)

During the Eastern Zhou dynasty, the weakened Zhou central sovereignty quickly lost control of its confederate vassal states, and the numerous autonomous states began overreaching and expanding their political ambitions via diplomacy and warfare, sparking a period of chaotic conflicts known as the Spring and Autumn period. After most of the smaller, weaker states were conquered and annexed by larger states, the geopolitical landscape eventually became dominated by seven most powerful states, and wars became increasingly pitched and violent. Over the Warring States period, many of the seven states underwent bureaucratic and military reforms in order to mobilise resources on a greater scale. This led to an intensification of warfare over the period, but also led to significant economic and cultural developments.

Hebei is a province in North China. It is China's sixth-most populous province, with a population of over 75 million people. Shijiazhuang is the capital city. It borders Shanxi to the west, Henan to the south, Shandong and Liaoning to the east, and Inner Mongolia to the north; in addition, Hebei entirely surrounds the direct-administered municipalities of Beijing and Tianjin on land. Its population is 96% Han Chinese, 3% Manchu, 0.8% Hui, and 0.3% Mongol. Varieties of Chinese spoken include Jilu Mandarin, the Beijing dialect of Mandarin, and Jin Chinese.

During the Spring and Autumn and Warring States periods (771–226 BC), the region was ruled by the states of Yan and Zhao. During the Yuan dynasty (1271–1368), the region was called Zhongshu. It was called North Zhili during the Ming dynasty (1368–1644), and simply Zhili during the Qing dynasty (1644–1912). The modern province of Hebei was created in 1928. Five UNESCO World Heritage Sites can be found in the province: the Great Wall of China, Chengde Mountain Resort, Grand Canal, Eastern Qing tombs, and Western Qing tombs. It is also home to five National Famous Historical and Cultural Cities: Handan, Baoding, Chengde, Zhengding and Shanhaiguan.

Wei (/weɪ/; Chinese: 魏; pinyin: Wèi) was one of the seven major states during the Warring States period of ancient China. It was created from the three-way Partition of Jin, together with Han and Zhao. Its territory lay between the states of Qin and Qi and included parts of modern-day Henan, Hebei, Shanxi, and Shandong. After its capital was moved from Anyi to Daliang (present-day Kaifeng) during the reign of King Hui, Wei was also called Liang (Chinese: 梁; pinyin: Liáng).

It should not to be confused with the smaller central Wey state 衞, which is still sometimes only differentiated by its Chinese character.

Jin (traditional Chinese: 晉; simplified Chinese: 晋, Old Chinese: *tsi[n]-s), originally known as Tang (唐), was a major state during the middle part of the Zhou dynasty, based near the centre of what was then China, on the lands attributed to the legendary Xia dynasty: the southern part of modern Shanxi. Although it grew in power during the Spring and Autumn period, its aristocratic structure saw it break apart when the duke lost power to his nobles. In 403 BC, the Zhou court recognized Jin's three successor states: Han, Zhao, and Wei. The Partition of Jin marks the end of the Spring and Autumn period and the beginning of the Warring States period.