China HowNet is the most comprehensive website for searching academic literature in China, mainly including core journals and professional journals. Authoritative, effective retrieval, comprehensive periodical types and wide coverage. Provide unified retrieval, unified navigation, online reading and downloading services for China academic literature, foreign literature, dissertations, newspapers, conferences, yearbooks, reference books and other resources.

2. Wanfang Data Knowledge Service Platform

Wanfang data, papers, documents, periodical papers, dissertations, academic conferences, Chinese and foreign standards, laws and regulations, scientific and technological achievements, Chinese and foreign patents and foreign documents. Focus on the core journals containing the statistical sources of papers of the Ministry of Science and Technology, with a high proportion of core journals, high quality of collected documents and irregular updates.

3. superstar discovery

The world's largest Chinese e-book website covers more than 85% of all books published in Chinese mainland after 1949, mainly targeting university users.

4.OALib free paper search engine

OALib is a website with more than 420W academic papers, covering mathematics, physics, chemistry, humanities, biology, materials, medicine, humanities, etc. The articles can be downloaded for free.

One of its major features is that it supports page snapshots functionally, and can directly browse basic information such as article title, author, keywords and abstract without leaving the station, which greatly shortens the time cost and is a relatively efficient paper search website.

5、BaseSearch？ Bielefeld academic search engine.

It is a multidisciplinary academic search engine developed by the famous university library in bielefeld, Germany, which provides integrated search services for heterogeneous academic resources around the world. BaseSearch integrates the book catalogue of the University Library in Bielefeld, Germany and the data of about 160 open resources (more than 2 million documents).