[nosnoop]

Originally Posted by spring93936

My book use the font MsYaHei
and
My chinese epub is mobi covert to epub~~is it that the problem?
your css is key in ??
@font-face {
font-family: "DroidSans", serif, sans-serif;
src:url(res:///ebook/fonts/DroidSansFallback.ttf);
}

thank you~~

Try adding the MsYaHei in the font family, i.e.:

@font-face {
   font-family: "DroidFont", "MsYaHei", serif, sans-serif;
   src:url(res:///ebook/fonts/DroidSansFallback.ttf);
   }