Fonds number is every code of fonds given by archive. At present, there are at least 3 kinds of archives dossier files suffered from loss. It brought incomprehensive file numbers, unclear identifying, untruly counting and tender management. The basic reasons why fonds number suffered from loss are misleading explanation, the lag of social archives consciousness and inefficient carrying out rule of law. The main ways to solve it is setting up the system of fonds number beyond the archive, inc...