Being one of the most cost-effective Office suite, Kingsoft Office 2013 now offers higher compatibility with Microsoft Office 2007 / 2010 open XML file formats.
Kingsoft Office 2013 is a great alternative to Microsoft Word, Excel and PowerPoint. If you or your company still need the full office productivity suite, instead of the cloud-based Office 365, why not consider switching to a more cost-effective but compatible office suite like Kingsoft Office. You will find the interface and features are quite similar.
Kingsoft Writer Open and edit Microsoft Word 2007 documents, and save documents as the following formats:
Kingsoft Spreadsheets can open and edit Microsoft Excel 2007 workbooks, and save workbooks as the following formats:
Kingsoft Presentation can open and edit Microsoft PowerPoint 2007 presentations, including *.ppt, *.pptx, and many other formats. When saving presentations, you can choose the common format of *.ppt.
Check this page for more details: Compatibility of Kingsoft Office with Microsoft Office.