1) China Knowledge Infrastructure Engineering Network (CNKI database).

"China Knowledge Infrastructure Engineering Network", namely "China Knowledge Network", is a national knowledge infrastructure led by Tsinghua Tongfang Co., Ltd. and Tsinghua University China Academic Journal (CD-ROM Edition) magazine.

Its CNKI series database includes periodicals, newspapers, dissertations, conference papers, standards, patents, etc. , including the full text of more than 8,000 articles published in domestic journals and newspapers since 1994. The database is authorized by relevant publishing institutions and can be published simultaneously with printed publications.

It is presented in PDF or CAJ format, which is completely consistent with the printed form, ensuring the timeliness, accuracy and reliability of the literature resources. This network platform has both social science literature and natural science literature, and is the largest Chinese literature data resource library in China at present.

Especially in recent years, it has promoted the signing of exclusive licensing agreements with related journals, and accumulated many important journal literature resources that other databases do not have.

2) Wanfang Data Knowledge Service Platform.

Wanfang Data Knowledge Service Platform is a large-scale Chinese network information resource system developed by Wan Fang Data Co., Ltd. and established on the Internet. It consists of business information subsystem serving the business and economic circles, science and technology information subsystem serving the scientific and technological circles and digital periodical subsystem.

The scientific and technological information subsystem is a scientific and technological information group integrating nearly 100 databases, including the full text of scientific and technological journals in China, scientific and technological papers and citations in China, papers and graduation papers of scientific and technological institutions in China, and scientific and technological celebrities in China, etc. The system is authorized by relevant publishing units, and its document publishing form is similar to that of China HowNet, and its resources cover periodicals, books, patents and standards in natural and social sciences.

The digital periodical subsystem enables users to directly obtain some full-text electronic periodicals newly provided by Wanfang Database on the Internet.

3) China Sci-tech Periodical Database.

China Sci-tech Periodical Database is a comprehensive database developed by Chongqing Weipu Consulting Company and a well-known database in the field of library and information science in China. It contains nearly a thousand Chinese periodicals, newspapers and foreign periodicals, which can be queried and downloaded.

Most university libraries have purchased the right to use the above-mentioned databases, and users on campus can use and download them for free. These databases are generally explained in detail, which is convenient for students to understand.