Family derived its name from the name of the Qin State Bank, which ended the rule of the family, "Cho." Taking the rulers of the family, "Qin" in the occupation and annexation of the neighboring kingdoms of China have opened their armies areas of "Sichuan", "Yunnan", and "Gecho" in the south, and reached their campaigns until the Red River, "Lanzhou" and Korea in the north.
In the year 221 BC. M took the title of governor, "Shi Huangdi." The unification of the kingdoms, and introduced with each new kingdom, annexing new administrative division, this was to divide based on the new centralized system, as was the bulk of the armies of the various provinces and by recruiting the sons of peasants
Forced the nobles of the former rulers on the migration of their areas of origin and residence in the capital of the empire, the most important steps that have been taken: standardized weights (weights), and units of measurement, currency, wheel diameters and written language. All these units are the same across the entire territory of the empire.