I couldn't preview Chinese HTML/XML file which are created from '/share' application. but Chinese TXT file is well and normal. The chinese content of three kinds of files are well and normal, except preview for TXT file. chinese enoding can't be display correctly.
for HTML, when I define the text contents with some special fonts in editior, preview will be ok. seems that if you don't define the fonts for whole HTML file text content, Alfresco won't find any fonts to preview it,Chinese characters will be garbled.
But for XML, I can't define text fonts with no entry.