The papers retrieved by Wanfang doi can be used by teachers, because Wan Fang Data is a domestic academic information resource, which contains a large number of academic papers, conference papers, dissertations and so on. The DOI retrieval function can help users find papers quickly and accurately through the DOI(DigitalObjectIdentifier) of papers. For teachers, using Wanfang DOI retrieval function can facilitate them to find and quote related papers, and can also be used to verify whether the papers cited by students are correct. Therefore, Wanfang DOI retrieval function can be used by teachers and has certain reference value.