Official website of the State Intellectual Property Office. China is one of the member states of the PCT. The China State Intellectual Property Office will publish relevant documents for PCT patent applications. Through the query and download functions on the official website of the China State Intellectual Property Office, you can find and download relevant PCT patent application documents. The PCT patent application is an international patent application document designed to provide applicants with a simplified, flexible and efficient way to apply for patent protection in multiple countries or regions.