Comparative study on the investigative system of official occupational crimes 并列题名:Comparative study on the investigative system of official occupational crimes a comparative study of the legal system of foundations Comparative study on legal system of financial supervision Comparative study on the legal system of securities market regulation Comparative study on the operational systems of the master plans in world cities Comparative study on the system of crime constitution theory Comparative study on the reintegration of criminals into society Comparative study on the legal protection system of the cultural heritage in Japan and China