ubuntu cannot show the chinese characters (Okular)

I recently find the fact that on my Karminc Ubuntu , i cannt read the chinese characters using Okular and other utilities.

i get it it lost a file of the Poppler library(poppler-data)

$ sudo apt-get install poppler-data

and then it’s ok now.

Reference:

http://en.wikipedia.org/wiki/Poppler_(software)