1. Step 1: Log in to webofscience to see if you can find the paper and issue a retrieval certificate for SCI papers, which is based on the successful retrieval of SCI papers. Retrieval is the last step of the publication of SCI papers, about 1-2 months after the publication of the papers. The specific method is to log in to webofsc...2. Step 2: print the first page of the paper, open the page of webofscience to query your paper, and print it out, which is actually to provide the title and journal name of the paper. Step 3: Find the service window of the school library. University libraries can issue search certificates and set up corresponding service windows. The author found the service window of the school library, submitted the printed paper page, and explained that he wanted to issue a search certificate. If the college requires the tutor to sign, it is necessary to ask the tutor to sign the printed copy in advance. 4. Step 4: The staff will issue the search certificate, and the staff will verify, distribute and stamp the printed copy provided by the author. At the same time, the author also needs to register and pay a certain fee, which is not very high, usually around tens of yuan. At this point, I got the SCI paper retrieval certificate.