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                     cn    China
               ac.         Academic and scientific research institutions
      cnc.                 Computer Network Center
      ihep.                Institute of High Energy Physics
               cnnic.      China Internet Network Information Center
               co.         Commercial
               edu.        Educational institutions
      cernet.              China Education and Research Network
      chisa.               China's Scholars Abroad
      net.                 China Education and Research Network
      pku.                 Peking University
               go.         Government agencies
               net.        Network information and operation centers
      bta.                 Beijing Telecommunication Agency
      cnnic.               China Internet Network Information Center
      shedi.               Shanghai Electronic Data Interchange
      sta.                 Shanghai Posts and Telecommunications Administration
      sti.                 Institute of Scientific and Technical Information
               or.         Non-profit organisations