1. The system only accepts documents with the file extensions txt, doc, pdf, docx, odt, odp, ods, jpg, gif, bmp, png, xls, or xlsx.
2. The file name cannot contain blanks or special symbols (such as:
\/~!@#$%^&*()_-+|'",
etc.), and is limited to 25 Chinese Characters or 75 English Letters.
3. The files uploaded may not exceed 10 MB (altogether). At most five files may be uploaded.
4. To upload a file, you have to press the button “Select”, choose a file and then press the button “Upload”.