School Library: Many school libraries will provide the service of issuing SCI retrieval certificates. The general process is to print out the first page of your paper (provide the title of the paper and the name of the journal), and then provide a printed copy to the service window of the school library, indicating that you need to issue a search certificate. If the school requires the tutor to sign, it is necessary to ask the tutor to sign the printed copy in advance. The staff will verify, issue and stamp, and at the same time need to register and pay a certain fee.

Scientific research institutions and affiliated university libraries: These libraries can also issue SCI retrieval certificates, and there will be corresponding service windows. The author found the library service window, submitted the printed paper page, and explained that the retrieval certificate should be issued. If the college requires the tutor to sign, it is necessary to ask the tutor to sign the printed copy in advance. The staff will verify, distribute and stamp, and the author needs to register and pay a certain fee.