Wei (state) in the context of "Canon of Laws"

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.

Zhao (traditional Chinese: 趙; simplified Chinese: 赵) was one of the seven major states during the Warring States period of ancient China. It emerged from the tripartite division of Jin, along with Han and Wei, in the 5th century BC. Zhao gained considerable strength from the military reforms initiated during the reign of King Wuling, but suffered a crushing defeat at the hands of Qin at the Battle of Changping. Its territory included areas in the modern provinces of Inner Mongolia, Hebei, Shanxi and Shaanxi. It bordered the states of Qin, Wei, and Yan, as well as various nomadic peoples including the Hu and Xiongnu. Its capital was Handan, in modern Hebei province.

Zhao was home to the administrative philosopher Shen Dao, Confucian Xun Kuang, and Gongsun Long, who is affiliated to the school of names.

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.

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.

Wei (/weɪ/; Chinese: 衞; pinyin: Wèi), commonly spelled Wey to distinguish from the contemporary larger Wei (魏) state, was an ancient Chinese state that was founded in the early Western Zhou dynasty and rose to prominence during the Spring and Autumn period. Its rulers were of the surname Ji (姬), the same as that of the rulers of Zhou. It was located in modern northeastern Henan Province, east of Jin (and later Wei 魏), and west of Cao.

The Partition of Jin (simplified Chinese: 三家分晋; traditional Chinese: 三家分晉; pinyin: Sānjiā Fēn Jìn; lit. 'Three Families Partitioning Jin'), refers to the division of the State of Jin between rival families into the three states of Han, Zhao and Wei, a watershed event marking the division between the Spring and Autumn and Warring States periods. Proceeding from the Jin, the three states were often referred to as the "Three Jins" (三晋; 三晉; Sān Jìn).

Because the process took several decades, there is some debate between scholars as to the year which best marks the true partition of Jin. Kiser & Cai (2003) state the most common dates picked by historians are 481, 475, 468, and 403 BCE. The last date, according to Sima Guang marks the conferring of Marquessates by King Weilie of Zhou on Wei Si, ruler of the State of Wei; Zhao Ji, ruler of the State of Zhao, and Han Qian, ruler of the State of Han.

Han was an ancient Chinese state during the Warring States period. Scholars frequently render the name as Hann to clearly distinguish it from China's later Han dynasty. It was located in central China (modern-day Shanxi and Henan) in a region south and east of Luoyang, the capital of the Eastern Zhou. It was ruled by aristocrats of the Ji (姬) family ancestral temple who rose to power as a ministerial family in the state of Jin, and whose power eventually eclipsed that of the Jin ruling house. The partition of Jin which resulted in the states of Han, Wei, and Zhao, marked the beginning of the Warring States period.

The state of Han was small and located in a mountainous and unprofitable region. Its territory directly blocked the passage of the state of Qin into the North China Plain.. Although Han had attempted to reform its governance (notably under Chancellor Shen Buhai who improved state administration and strengthened its military ability) these reforms were not enough to defend itself and it was the first of the seven warring states to be conquered by Qin in 230 BC.

Marquess Wen of Wei (died 396 BCE), personal name Wei Si, was the founding marquess of the Wei state. He belonged to the Wei clan, one of the noble houses that dominated Jin politics in the 5th and 6th centuries BC.

He became the leader of the Wei clan in 445 BCE, succeeding his father Viscount Huan, and in 424 BCE adopted the title of "Marquess" (侯). In 403 BCE, King Weilie of Zhou acknowledged Wei Si as Marquess of Wei while conferring similar titles on the leaders of the Han and Zhao clans, thereby effectively splitting the Jin state into three and confirming the Partition of Jin.