I think you need to install Chinese fonts.
sudo apt-get install language-pack-zh*
sudo apt-get install chinese*
sudo apt-get install fonts-arphic-ukai fonts-arphic-uming fonts-ipafont-mincho fonts-ipafont-gothic fonts-unfonts-core
sudo apt-get install language-pack-zh*
sudo apt-get install chinese*
sudo apt-get install fonts-arphic-ukai fonts-arphic-uming fonts-ipafont-mincho fonts-ipafont-gothic fonts-unfonts-core