Check with your company 1st to make sure it is ok to install the operating system. I believe most OEM operating system are capable to read Chinese font, but in order to use Chinese menus, you need an operating system with Chinese language support
https://www.blackberry.com/Downloads/browseSoftware.do
Blackberry Handheld Software v4.1.0.529 (Chinese)
Also check out this link
http://www.blackberryforums.com/gene...e-support.html