How to stipulate the PCT patent application? How to choose the type of protection?

How to stipulate the PCT patent application? How to choose the type of protection? An application submitted in the manner specified in PCT is called an international application. So how is the PCT patent application stipulated? How to choose the type of protection? How to stipulate PCT patent application? Generally speaking, an international application is a patent application filed by a resident or national of a PCT Contracting State to protect several Contracting States. Before China joined the PCT, according to the principles of the Paris Convention, applicants could only file patent applications with foreign countries. After China joined the PCT, the applicant can also use the PCT to file an international application. When the applicant wants to obtain protection from multiple countries for an invention, it is appropriate to use the PCT method. Because through the PCT channel, at the beginning of the application, only one international application needs to be submitted to the Chinese Patent Office, which saves the trouble of submitting national applications to each country separately. Individuals and units in China can still apply to foreign countries in accordance with the principles of the Paris Convention. Especially when the applicant only needs to apply for a patent in one country or several countries, it is appropriate to use the Paris Convention. How to choose protection type in international application? At present, the number of PCT members has reached 126. These countries include the United States, Japan, Canada, Russia and other industrialized countries, all parties to the European Patent Convention, and developing countries such as South Korea and Brazil, covering almost all the important countries in the world that have implemented the patent system. When an applicant from China files an international application through the PCT channel, all PCT member countries are automatically designated, that is, the international application is valid in all PCT member countries. How to stipulate the PCT patent application? How to choose the type of protection?