On the one hand, this review system is conducive to the timely disclosure of invention technology and promotes the exchange and development of science and technology. On the other hand, it can cause some applicants to lose their invention due to various reasons (such as thinking that their invention is still valid after application). immature, or believe that the invention has lost its novelty, or believe that the invention lacks economic value) will no longer request substantive examination, thereby reducing the workload of the patent department and avoiding the backlog of applications.