Glo Chinese ebook not displaying

I just purchase a Kobo Glo today, and update to firmware 2.3.1

I follow everyone suggestion about create the "fonts" directory and copy the msjh.ttf into the kobo glo.

When I browse my Chinese epub, I can see the filename and author name in Chinese, but when I open the Chinese epub, it give me rectangular box.

I try different Chinese fonts file, and nothing seems to fix this. I tried epub which is generate by myself, and Chinese epub I download, nothing seems to work.

Am I the only one facing this problem? is it because of the 2.3.1 firmware?

Thanks in advance.