CNKI academic literature database of China HowNet includes full-text database of Chinese doctoral dissertations, full-text database of China excellent master dissertations, full-text database of international conference dissertations and full-text database of China patents. Including China's invention patents, utility models and designs. By March, 2020, there will be 1 1.38 million patents, and the national database of appraisal opinions on innovation achievements of scientific and technological projects. By March 2020, the database of scientific and technological achievements has included 650,000 standard data and 2 1 10,000 appraisal data.