When is the application date? Is there a difference between the application date and the priority date?

The filing date refers to the date when China National Intellectual Property Administration receives the patent application documents. It can be the face-to-face application date, the mailing application date, or the international application date when the applicant applies for an international patent through PCT. This date is the only legal basis for judging the order of application, and it is also the time standard for judging the patentability conditions. 2. Is there a difference between the application date and the priority date? Priority date usually refers to the filing date of the first application as the basis of foreign priority or domestic priority. When the latter application claims priority, the filing of the latter application refers to the priority date. Of course, if the priority is not established, the filing date of the case is the filing date or the mailing date. For a patent application with priority, the filing date refers to the priority date when calculating the annual term, and the priority date is taken as the starting date of the annual calculation.