The priority system is an important system in the application and authorization of patents and trademarks. The application for patents and trademarks generally adopts the first-to-file principle. In order to obtain corresponding intellectual property rights in various countries in a timely manner, applicants need to apply to the relevant departments of each country as early as possible. However, the preparation and translation of application documents, as well as the collection of application fees, take time, so it is actually difficult for applicants to apply to various countries at the same time. However, if the applicant does not mention it at the same time, others may take advantage of the loophole and apply first. In order to solve this problem, the "Paris Convention" stipulates a priority system, which means that an applicant who files an application for invention patent, utility model, design or trademark registration in a contracting member state files an application for the same invention within the specified period. Those who apply for registration and then submit applications with the same content to other members will enjoy priority. That is, the date of first submission of an application to a certain member country can be regarded as the priority date of subsequent applications submitted to other members, and can be used as the starting date for searching for prior art, etc., and judging whether authorization can be granted, without Affected by the submission of the same application by others within the above period. For example, if the applicant applies for a patent in a certain country on January 5, 2018, and files an application for the same invention-creation in another contracting country on May 7, 2019, the later application can be filed earlier than the filing date of 2018. January 5th is the priority date. Different intellectual property rights enjoy different priority periods: 12 months for inventions and utility models, and 6 months for designs and trademarks.