This website contains the titles and abstracts of most published English papers. It is the largest comprehensive academic information resource in the world, covering the most subjects. Including 8850 (SCI)+3200 (SSCI)+1700 (AHCI), it is the most influential core academic journal in natural science, engineering technology, biomedicine and other research fields.
Among them, the impact factor (IF) introduced by the Web of Science has now become a general index for periodical evaluation in the world. It is not only an index to measure the usefulness and exhibition of periodicals, but also an important index to measure the academic level of periodicals and even the quality of papers.
SCI-Hub was founded because a female researcher was worried that she could not find free literature. For the detailed process of this story, interested students can find information. Then sci-hub has been sued for copyright issues, so the website always changes irregularly. You can check the latest websites online.