ok,显示正常了,
原来用
<match target="font">
<edit name="hinting" mode="assign">
<bool>true</bool>
</edit>
<edit name="antialias" mode="assign">
<bool>false</bool>
</edit>
</match>
<match target="font">
<!-- check to see if the pattern requested > "medium" -->
<test target="pattern" name="weight" compare="more">
<const>medium</const>
</test>
<!-- pretend the font is bold now -->
<edit name="weight" mode="assign">
<const>bold</const>
</edit>
</match>
<!--
<match target="pattern">
<test name="family">
<string>SimSun</string>
</test>
<test name="weight" compare="more_eq">
<const>bold</const>
</test>
<edit name="family" mode="assign">
<string>SimHei</string>
</edit>
</match>
-->
就是把后半部分干掉就可以了,xtt支持bold的说。不用代替哈,现在有点清楚了。