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China Knowledge Network refers to China's national knowledge infrastructure, which was initiated by Tsinghua University and Tsinghua with the support of the Ministry of Education, Publicity Department of the Communist Party of China, the Ministry of Science and Technology, the State Administration of Press, Publication, Radio, Film and Television, and the State Planning Commission. Founded in June 1999, it aims to realize the dissemination, enjoyment and value-added utilization of knowledge resources in the whole society.

The concept of national knowledge infrastructure (NKI) was put forward by World Development Report 1998 of the World Bank. 1March, 1999, the overall goal is to comprehensively open up information channels in all aspects of knowledge production, dissemination, diffusion and utilization, and build an exchange and cooperation platform to support knowledge innovation, learning and application in various industries across the country.

Wang Mingliang proposed to build China National Knowledge Infrastructure (CNKI), which was listed as a key project in Tsinghua University.