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Investigating censors (Chinese: 監察御史; lit. 'Monitoring & Investigating Royal Scribes/historians') were Censorate officials in imperial China's civil bureaucracy between the Sui (581–618) and Qing (1644–1912) dynasties. They were in charge of investigations and impeachment, including duties such as:
gather complaints from the people
review the handling of prisoners
impeach officials for misconduct
Since the Yuan dynasty, investigating censors were also authorized to submit remonstrances or suggestions about the emperor's conduct or policies.