Use the school intranet, because the school paid for China Knowledge Network. I have encountered a similar situation if I can't download files from home or Internet cafes. If you can't use the intranet, there are several situations in which you can't find the graduation thesis on China Knowledge Network, including: the thesis is included in the self-built database of our school; The graduation thesis of master's and doctoral students belongs to classified thesis; The paper is in the transition period of collecting papers and has not been included.

HowNet, the concept of national knowledge infrastructure, was put forward by the World Bank in 1998. CNKI project is an information construction project aimed at realizing the dissemination, enjoyment and value-added utilization of knowledge resources in the whole society. Initiated by Tsinghua University and Tsinghua Tongfang, it was established in June 1999.