1, China Knowledge Network (CNKI)
China HowNet Database is a comprehensive full-text database, including academic literature resources such as periodicals, doctoral and master's dissertations, conference papers, newspapers, yearbooks, citation databases, and China economic and social big data research platform. These subjects include social science, natural science and technical science. The retrieval results are the most, the disciplines are the widest and the contents are complete.
For individual users, HowNet adopts two standards: charging by article and charging by page. The charge price per article is in 7.5 yuan -25 yuan/article, and the charge per page is around 0.5 yuan/page.
2. Wanfang Data Knowledge Service Platform
Wanfang Database contains more than ten kinds of knowledge resources, including periodical papers, dissertations, conference papers or reports, scientific and technological reports, patents, standards, scientific and technological achievements, laws and regulations, local chronicles, videos, etc., covering all disciplines such as natural science, engineering technology, medicine and health, agriculture, philosophy, politics and law, social science, science and education, literature and art, etc. The literature with the shortest collection time and a little longer can't be found, but the current issue is the best.
3.Vip periodical resources integration service platform
VIP database covers tens of thousands of Chinese periodical data resources in natural science, engineering technology, agriculture, medicine and health, economy, education, library and information, including seven kinds of knowledge resources such as natural science, engineering technology, agricultural science, medicine and health, economic management, education science and library and information. The collection time is the longest, but there are few medical journals, and common IE, me, Firefox and 360 browsers can be used.
After registering as a member, some articles can be read and downloaded for free online. Articles that need to be paid can be paid by reading money, or by WeChat or Alipay. The charging rules for reading currency payment are 0.5 yuan/article within 4 pages, 2 yuan/article with 4 pages or more, WeChat or Alipay 3 yuan/article.