1)Now we can install some chinese packages,the commands are :
sudo apt-get install language-pack-gnome-zh
sudo apt-get install language-pack-gnome-zh-base
sudo apt-get install language-pack-zh
sudo apt-get install language-pack-zh-base
sudo apt-get install language-support-zh
2)make sure the system support the chinese input
sudo apt-get install scim
sudo apt-get install scim scim-modules-socket scim-modules-table scim-pinyin scim-tables-zh scim-input-pad
sudo sh -c " echo 'export XMODIFIERS=@im=SCIM ; export GTK_IM_MODULE="scim" ; export QT_IM_MODULE="scim" ; scim -d ' > /etc/X11/Xsession.d/95xinput "
sudo chmod 755 /etc/X11/Xsession.d/95xinput