just surfing aroung chinese forum and found out this and like to share with you guys...
the font can support chinese language and looks bigger in the menu
besides that the font can increases your free ram about 1MB
i got my 6630's ram to 7mb++ after install it
before that only 6mb++

instruction:
remove C: and E: /system/fonts folder
then copy the c and e /system/fonts from the .rar file into your C: and E:/system/ seperately
restart your phone

to uninstall:
remove the C:/system/fonts folder and restart
then remove fonts folder from E: