满铁国策会社,在日本侵华期间,根据军事保密需要,制定了一套严格的军事关系涉密文件保密制度。对涉密文件种类、密级划分和涉密内容都有严格的规定,对机密文件的保管、借阅及使用,制定了一整套严密规范的保密制度,并为机密文件的保密和安全管理,尤其是对过期不用的机密文件,制定了非常严格的监督销毁制度。 During the period of Japan’s invasion of China, Manchuria State Cemetery Society formulated a set of stringent confidentiality protection system for military relations based on the needs of military secrecy. The types of classified documents, the classification of classified and confidential content has strict rules, the confidential documents, borrowing and use, developed a set of strict and standardized system of confidentiality and confidential documents and security management, in particular For outdated confidential documents, a very strict system of supervision and destruction has been put in place.