After I made & saved sample presentation document at LibreOffice in .pptx. Then I opened it in LibreOffice, the text was irregular according to the terms. After I saved via .odp, odt, .ods in LibreOffice, It couldn’t open in KingsoftOffice, because these format unsupported. What’s the problem?
Without seeing an example it will be difficult to know exactly what the problem is. We will also need further detail on what you mean by “the text was irregular according to the terms” as this could refer to all kinds of different problems. It is likely that what you are experiencing is a lack of support / bug for the PPTX format. There are a number of open bugs relating to the terms “pptx+text”. I suggest you have a look through those to see if any appear similar to what you are experiencing.
If you cannot find a bug related to your problem, please file a bug. Either way, please report your findings back here and if you find or file a bug provide the bug number in the format “fdo#123456”.