You are right bud, Huobi was the largest exchange (by volume), but BTCChina overtook on Wednesday/Thursday. Circa 42000 BTC (24Hr period)
Here's an exchange tracker; http://btckan.com/price
At this moment, what I see in that website is:
Market 24H volume
BTCChina 1080.53
OkCoin 13661.9
HuoBi 14530.6
Maybe we will get a better picture after the chinese new year holiday.
Oops, looks like RockHound see it as well
Eyes open brother Yeah this is pretty strange, at first I thought it might have something to do with their 'Maker-taker' Bonus Scheme? Here's another link checkout the differential between past 2 days: http://bitcoincharts.com/markets/btcnCNY_trades.html
Enjoy rest of weekend mate