Wikipedia
CNKI (China National Knowledge Infrastructure, 中国知网) is a key national information construction project under the lead of Tsinghua University, and supported by PRC Ministry of Education, PRC Ministry of Science, Propaganda Department of the Communist Party of China and PRC General Administration of Press and Publication. This project was firstly launched in 1996 by Tsinghua University and Tsinghua Tongfang Company. The first database was China Academic Journals Full-text Database (CD version), which became popular in China rapidly, especially in academic libraries. In 1999, CNKI started to develop online databases. Till now, CNKI has built a comprehensive China Integrated Knowledge Resources System, including journals, doctoral dissertations, masters' theses, proceedings, newspapers, yearbooks, statistical yearbooks, ebooks, patents, standards and so on. 10 services centers have been set in Beijing, North America, Japan, North Korea, Taiwan and Hong Kong. And it is widely used by universities, research institutes, governments, think tanks, companies, hospitals and public libraries around the world.
CNKI keeps integrating new contents and developing new products in 2 aspects: full-text academic resources, software on digitization and knowledge management. Began with academic journals, CNKI has become the largest and mostly-used academic online library in China.
In January 2013, CNKI was designated as the second agent of DOI in mainland China by International DOI Foundation, and the first one was Institute of Scientific and Technical Information of China.。