That reminds me. There's two VERY EXPENSIVE Yinhe rubbers on sale that are not in the catalog, hence no spin/speed/RMB price, those are Moon Pro and Sun Pro. No idea what the rationale behind them are, they're around $30 a sheet. Probably supposed to mimic DHS "Provincial" Hurricane. Plain plastic wrappers, I think there's a "free" rubber protector sheet inside the shrink wrap.
There's also a lot of older rubber that's no longer in the catalog on sale - the original Mercury, original Apollo, original Earth etc. (the current ones are "II" and "III"). And these are fairly cheap, though not cheap enough for me to want to try. The cheapest Yinhe rubber is the two-for-one "generic" version of 9000. The sheets are already cut into an oval, but it is oversized so it'll fit any reasonable blade. Turns out they actually mold the sponge in this shape (it seems to be for their pre-made racket line). The eacheng.net price is $6 for two sheets (!), typically $10 for a pair elsewhere. This is what I currently have on my backhand and I like it a lot. If I needed a lot of club sheets I'd probably order a bunch of these from eacheng.net.
Iskandar