You said you run your current forum through freeforum.org, their site is in chinese, I do not read chinese.
The only "working" importer that's out *right now* is from PHPBB, so if you want to import what you currently have to the UBB, you'd have to be running that. As i cannot read chinese, and i don't have your url, i tried the best I could to identify what forum solution you're using right now, which isn't possible since again I don't read chinese.
As for the "groupee side of things" comment, Groupee is the owner of the UBB, if you pay for installation from them, they'd be the ones to do it; as I'm not employed by Groupee, I can only make assumptions on their turnaround time, hence me referencing any work they'd do as "the groupee side of things".
