China National Knowledge Infrastructure (CNKI), established by Tsinghua University and supervised by the Ministry of Education of the People's Republic of China, as one of the first publishers authorized to online publishing by the State Administration of Press, Publication, Radio, Film and Television (GAPP) of China, is engaged in digital publishing of CNKI database resources. CNKI.net is an online publishing platform for achievements of Chinese National Knowledge project. This site is the most comprehensive gateway of knowledge of China. Over ten service centers are located in Beijing, North America, Japan, Korea, Taiwan and Hong Kong. A sales network is composed of 13 agents and offices outside mainland China. As the most comprehensive gateway of knowledge of China, CNKI has over 1,300 overseas institutional customers from 38 countries and regions with a large amount of loyal subscribers, ranging from top universities, research institutes, government think-tanks, enterprises, hospitals to public libraries.