What's the difference between patent reexamination and administrative reconsideration?

Patent re-examination: refers to that the patent applicant refuses to accept the decision of the patent administrative department of the State Council to reject the application, and may request a re-examination to the Patent Re-examination Board within three months from the date of receiving the notice. Re-examination here refers to a single act of rejecting a patent application. The accepting department is the Patent Reexamination Board of the State Intellectual Property Office.

Administrative reconsideration: refers to citizens, legal persons or other organizations that believe that a specific administrative act has infringed upon their legitimate rights and interests, and can submit an application for administrative reconsideration to the administrative organ within 60 days from the date of knowing the specific administrative act. The scope of reconsideration here includes eleven situations. The accepting department is the legislative affairs office of governments at all levels, government departments at all levels and other administrative organs that can exercise the right of reconsideration.