This is not the first time. CNY volume has really taken off in the last 2 months! More tickers/charts need to add the rest of the CNY exchanges. Many of them only have BTCChina - which used to have ~90% of the volume, now they are typically closer to 10%.
Can't wait to see what happens when China -really- notices Bitcoin.
I think it's first time for aggregate volume. Not 100% sure because my data set doesn't cover everyday.. But only a couple data points missing. Ditto on BTCC tho