According to some survey, IPB is the most popular forum systemv in China, But I find you have no Chinese version. Althogh I want to purchase a license, but I can't translate it to Chinese, and I can't get some local support(I can only write a little English). So, if you guys found a Chinese office, I think you can get a lot of customers.

a suggestion! I hope you will accept it

You can download the Chinese Language from Invisionize Mods.

Here are three that I found:

http://mods.invisionize.com/db/index.php/f/5320
http://mods.invisionize.com/db/index.php/f/5311
http://mods.invisionize.com/db/index.php/f/5310

And Invision Power Services only makes their award-winning bulletin board software in English, but you are free to add language packs to your board to suit your board according to your language and culture.