qin

Qin (CHIN, , or Ch'in) was an ancient Chinese state during the Zhou dynasty. It is traditionally dated to 897 BC. The state of Qin originated from a reconquest of western lands that had previously been lost to the Xirong. Its location at the western edge of Chinese civilisation allowed for expansion and development that was not available to its rivals in the North China Plain.
After extensive reform during the 4th century BC, Qin emerged as one of the dominant powers among the Seven Warring States. It unified the seven states of China under Qin Shi Huang in 221 BC. This unification established the Qin dynasty, which, despite its short duration, had a significant influence on later Chinese history. Accordingly, the state of Qin before the Qin dynasty was established is also referred to as the "predynastic Qin" or "proto-Qin".

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