Does the Yunnan Provincial Examination 2022 household registration or student origin limit the county must have local household registration?

Yes.

The student’s place of origin is the university where he was admitted, and his household registration is the place where he has his household registration. The college entrance examination must require local household registration, which usually lasts for 1-3 years. In some provinces in the west, in order to prevent immigration for the college entrance examination, the requirement is three years.

What is the difference between "Limited to household registration in this county and the source of students" and "Limited to household registration in this county"? The former: the household registration must be in the local area, or students who have passed the examination in the local area but their current household registration is not in the local area. That is, those whose registered permanent residence is local and those whose registered permanent residence is not local; the latter: the registered permanent residence must be local now, no matter where they are from.