How to understand the priority of patent pct?

How to understand the priority of patent pct? Divide the words first. What is pct? The preemptive right refers to the priority of patent, but what is the priority? First of all, pct patent application is a way of international patent application. If the patentee wants to apply for a foreign patent, he can apply for a patent in the form of pct patent application. Priority can also be divided into two types, namely international priority and domestic priority; Obviously, pct priority belongs to the former category. How to understand the priority of patent pct application in the related article "Priority Examination"? An international application may claim the priority of one or more earlier applications with the same subject matter. For an international application claiming priority, the application date of the earlier application, the application number of the earlier application and the country that accepted the earlier application shall be stated in the request. If the international application does not have a written statement requesting the priority of the earlier application, or the statement is incorrect, the applicant is allowed to make corrections within the next 4 months. After filing a written statement claiming priority, the applicant shall submit a copy of the earlier application (i.e. the priority document) which is the basis of the priority claim to the acceptance office or directly to the International Bureau. PCT is the abbreviation of PatentCooperationTreaty. As can be seen from the name, the Patent Cooperation Treaty is an international cooperation treaty in the patent field. Since the adoption of the Paris Convention, it has been regarded as the most important symbol of the progress of international cooperation in this field. Whether it is international priority or domestic priority. Subset patents are essentially needed, that is, derivatives of patent applications; These conditions are also required if you want to apply for pct patent priority; So there are Paris Convention and pct, which is better to apply for? In fact, the relationship between PCT and Paris Convention is not competitive, but complementary. After the pct application, it is not actually a pct international audit. The substantive examination of the final patent still needs to be submitted to the applicant country before it can be authorized.