“…Non-registered users can obtain services other than full-text services for free, and registered users can also obtain full-text services [5,6]. The document retrieval column provides users with query and sharing services for various scientific and technological document titles or abstracts [7]. The reference types include journals, conference proceedings, dissertations, scientific and technological reports, patent standards and books, etc., the types of reference involve China, West, Japan, Russia, etc., and the fields involve medicine, architecture, chemical engineering, etc.…”