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During China's Han dynasty (206 BCE–220 CE), the empire was divided into administrative units called commanderies. Initially, vast territories were granted as kingdoms to the emperor's relatives. However, by around 100 BCE, the central government consolidated power, incorporating most of these lands into commanderies directly under its administration.

Each commandery was overseen by a governor and a commandant, both appointed by the central government. These units were further divided into prefectures and districts. While nobles held titles and collected taxes from their assigned areas, they did not possess administrative or judicial authority. The commandery system evolved over time, with the number of units increasing significantly. Special agencies also managed specific industries and frontier controls. To improve oversight, regional inspectors were appointed to report on official efficiency and corruption.12

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