The Canal Inspectorate Censor was also a rank-seven official, holding the same powers of inspection, investigation, impeachment, and memorial submission as the Commissioner of Education.
In plain terms, they had the right to file secret reports that went straight to the Old Ancestor’s desk.
There was no fixed quota; sometimes four, sometimes six, and sometimes more than ten were appointed. In the seventeenth year of Qianlong’s reign, four additional Canal Inspectorate Censors were dispatched to Tongzhou alone.
Chapter 189