When will the patent expire if it is not handled in time after authorization?

after the patent administration department of the State Council issues the authorization notice, the applicant shall go through the registration formalities within 2 months from the date of receiving the notice. If the parties lose their rights due to irresistible delay, they may request the restoration of their rights within 2 months from the date of removal of the obstacle to 2 years at the latest from the date of expiration of the time limit. If the party concerned loses his rights due to other formal reasons, he shall request to restore his rights within 2 months from the date of receiving the notice.