1. 编辑 /etc/fonts/conf.d/49-sansserif.conf
将<edit name="family" mode="append_last">
<string>sans-serif</string> </edit>
改为
<edit name="family" mode="append_last"> <string>文泉驿正黑</string> </edit>
2.
$ sudo apt-get install xpdf-chinese-simplified poppler-data