There may be the following reasons: 1, document error: it is necessary to submit a paper document in the format required by the system, such as word version or PDF version. The submitted and uploaded document is too large. If it exceeds the graduation thesis 15MB, the test fails. 2. There are too many words in the paper: the detection system has a word limit, and HowNet detection is measured by article. Different detection systems have different restrictions on the number of characters. If the number of characters exceeds the limit of the selected paper detection version, the detection will not succeed. 3. Incomplete information: the title and author of the paper were not submitted when the paper was submitted for testing.

About hownet:

China Knowledge Network refers to China National Knowledge Infrastructure (CNKI), which is a knowledge informatization construction project initiated by Tsinghua University and Tsinghua with the support of Ministry of Education, Publicity Department of the Communist Party of China, Ministry of Science and Technology, State Administration of Press, Publication, Radio, Film and Television and State Planning Commission, aiming at realizing the dissemination, enjoyment and value-added utilization of knowledge resources in the whole society. Established in June 1999.

The concept of national knowledge infrastructure (NKI) was put forward by World Development Report 1998 of the World Bank. 1In March, 1999, Wang Mingliang proposed to build China National Knowledge Infrastructure (CNKI), which was listed as a key project in Tsinghua University, with the overall goal of comprehensively opening up information channels in all aspects of knowledge production, dissemination, diffusion and utilization, and building an exchange and cooperation platform to support knowledge innovation, learning and application in various industries across the country.