I still got some questions: <ol> <li>If it is the patent issue that blocks the implementation of normal randering currently, why can Xpdf show normal result?</li> <li>How can I get around this issue and still use free software(maybe by modifying some configuration files, etc...)? (I know Adobe Reader show correct result, but I prefer the environment of free software)</li> <li>I really want to know about the SimSun Issue. But I am not familiar with that. Hence, I don't know much of the basic terminology like (1)TrueType rasterizer, (2)hinting instruction, (3)glyphic component, (4)composed glyph shape. Maybe you can refer me, such a newbie in this field, to some basic documents. Then I can ask you if I have further questions. Of course, many people will appreciate, including I, if you have the time and energy to write some about it.</li> <li>About the two solutions you proposed: How can I update FreeType font? How can I enable TrueType rasterizer by using older FreeType font with non-default configuration?</li> </ol>