1.WebofScience: Developed and maintained by ClarivateAnalytics, it is one of the leading academic citation databases in the world. It includes periodical articles, conference papers, books and so on in various fields, including science, social science, art and humanities.
2.Scopus: Developed and maintained by Elsevier Company, it is one of the largest academic citation databases in the world. It includes periodical articles, conference papers, books and so on in various fields, including science, social science, art and humanities.
3.PubMed: maintained by the National Library of Medicine (NLM), it is one of the most important literature databases in the biomedical field. It contains biomedical literature from MEDLINE database, including periodical papers, books and reports.
4.IEEEXplore: maintained by the Institute of Electrical and Electronics Engineers (IEEE), it is one of the most important literature databases in the field of computer science and electrical engineering. It includes periodicals, conference papers and technical standards published by IEEE.
5.GoogleScholar: Developed and maintained by Google, it is a free academic search engine. It can search all kinds of academic resources, including academic journal articles, dissertations and discussion papers.
6.ElsevierScienceDirect: Developed and maintained by Elsevier Company, it is one of the largest full-text academic journal databases in the world. Including periodical articles, books and so on in various disciplines.
7.SpringerLink: Developed and maintained by Springer Publishing House, it is one of the world's leading full-text academic journal databases in the fields of science, technology and medicine. Including periodical articles, books and so on in various disciplines.