The file name can be composed of Chinese characters, English letters and some special symbols. The rules for its use in file names should be to facilitate your future use of finding file names. The image should be profound and the name should be concise. Chinese characters plus some special symbols can be used as file names.
There is a suffix name after the file name. The suffix name represents the file generated by different tools. For example, the suffix name generated by word is BOC, and the file name is displayed by Excel. That is, other names, and system file names, that is, dot co M and dot exe. Different suffix names represent different files generated by different tools, that is to say, there are usage files, system files, and tool files.