Invention patents have substantive examination (actual examination). In the actual examination process, the examiner will point out the places or questions that do not meet the requirements in the application and issue documents asking the applicant to answer those questions. This article is called' notice of examination opinions'. This process usually takes 2~3 rounds. Namely' the first review notice' and' the second review notice'. . . . The defense/defense/opinion statement is usually called "trial defense", "trial defense" or "OA (Office Action) defense". Different times can be called' one pass defense' and' two pass defense' respectively. . .