I'm fairly sure Bianchi "Reparto Corse" carbon rimmed wheels are all stock Yuan An stuff too.
Interesting, what makes you think that?
If I had to guess, I'd say chances are that they are made by vision - Bianchi's in-house Velomann alloy wheels use Vision hubs (carbon wheels have unbranded hubs from what I could see at the store), also sometimes they use Vision wheels instead of their own Velomann wheels (I just bought Specialissima Comp and instead of 33mm deep Velomann carbon wheelset it came with Vision SC30 wheelset).