what forum engines are popular in Chinese internet and how does search work in them?

in the English internet the popular ones seem to be vBulletin and phpBB. How about the Chinese one?

In terms of search, for instance vBulletin (used by SD) and phpBB use MySQL database engine, which could provide full text search, and also have their own search modules. But, MySQL full text search doesn’t do Chinese segmentation, and from what I can see on google, the native search modules of these 2 popular forums don’t do it either.

Then again, perhaps it’s possible to do the search even without segmentation, using MySQL full text search, at the expense of being slow in the absence of an index.

Well, that’s all theory and musings. In practice, what forum software is popular in the Chinese internet nowadays? And what sort of search do they have running there?