There is no PPT on the internet. HowNet is a powerful database collection system, which contains many academic journal papers and so on, and can be used as reference materials for academic research.

Select the literature to download from the search results, click "Export Analysis", select the literature again, and click "Read". You can read the first 10% of the literature for free.

The HowNet project was proposed by the World Bank in 1998. China Knowledge Network Project is an information construction project to realize the dissemination, sharing and value-added utilization of knowledge resources in the whole society. Initiated by Tsinghua University and Tsinghua Tongfang, it was established in June 1999.

With the strong support of the Party and state leaders, the Ministry of Education, Publicity Department of the Communist Party of China, Ministry of Science and Technology, etc. After years of hard work, all walks of life have adopted self-developed and internationally advanced digital library technology to build the "CNKI Digital Library" with the largest full-text information in the world.