Diwu Qi (第五琦) (712 or 713 – September 19, 782), courtesy name Yugui (禹珪), formally the Duke of Fufeng (扶風公), was an official of the Chinese dynasty Tang Dynasty who served briefly as chancellor during the reign of Emperor Suzong, but was more known for his influence on financial policies throughout his career, including his advocacy for the state-run monopolies over salt and iron.