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Circuit (subnational entity)

Circuit
China, 742.svg
The inspection circuits of the Tang dynasty in 742
Chinese name
Chinese
Literal meaning way, path, circuit
Korean name
Hangul
Hanja
Japanese name
Kanji

A circuit was a historical political division of China and is a historical and modern administrative unit in Japan. The primary level of administrative division of Korea under the Joseon and in modern North and South Korea employs the same Chinese character as the Chinese and Japanese divisions but, because of its relatively greater importance, is usually translated as province instead.

Circuits originated in China during the Han dynasty, and were used as a lower tier administrative division, comparable to the county (縣/县, also translated as "districts"), but only to be used in areas in the fringes of the Empire, that were either primarily inhabited by non-Han Chinese peoples, or too geographically isolated from the rest of the Han centers of power. The system fell into disuse after the collapse of the Western Jin dynasty.

The administrative division was revived in 627 when Tang Emperor Taizong made it the highest level administrative division, and subdivided China into ten circuits. These were originally meant to be purely geographic and not administrative. Emperor Xuanzong added a further five and slowly, the circuits strengthened their own power, until they became powerful regional forces that tore the country apart during the Five Dynasties and Ten Kingdoms period. During the Later Jin and Song dynasties, circuits were renamed from dao to lu (), both of which literally mean "road" or "path". Dao were revived during the Yuan dynasty.


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