Qín-Hàn shíqī de hěnduō zhìdù, bǐrú jùnxiànzhì, yǐngxiǎng le hòulái liǎngqiān nián de Zhōngguó.
Many Qin and Han institutions, such as the system of commanderies and counties, shaped China for the next two thousand years.
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Neighbouring dynasties are often joined to name the whole stretch: 秦汉, 唐宋, 明清. The Qin unified China in 221 BC and the Han lasted until AD 220, so 秦汉 covers the first four centuries of the empire.