Duji () was a circuit of the Chinese Táng Empire. It was established by Emperor Xuánzōng and covered today's Luòyáng (then Dōngdū / Henan Prefecture [Hénán Fǔ]) and the area around it. Duji Circuit was succeeded by the Song dynasty's Jingxibei Circuit (Jīngxīběi Dào). It contained three prefectures: Dōngdū (), Luòzhōu (), and Rǔzhōu ().
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