In order to promote the constructions of group knowledge platform, November 6th to 10th, subject librarian Li Dajun and group knowledge platform technical personnel Wang Feng went to Nanjing institutes to survey group knowledge platform constructions, and helped to solve the difficulties in the process of project implementation.7th morning, Li Dajun and Wang Feng were invited to participate in the knowledge platform project group exchange of Purple Mountain Observatory. The next day, Li Dajun and Wang Feng went to Nanjing Institute Astronomical Optics and Technologyto introduce the group knowledge platform sustainable service ability construction phase ii project to the scientific research personnel, discipline group secretary.During in Nanjing,Li Dajun and Wang Feng also visited Institute of Geography and Limnology, Institute of Geology and Palaeontology, and had an informal discussion with the persons in charge of the Library and Information of the institute.