is that a bad news ? 
Not really. It's more pathetic. I always consider Chinese exchanges volumes 10x lower than what they are. If they have a 24 hour volume of 500,000BTC I simply count it as 50,000BTC volume.
If this would be the case, the volume still would be impressive.
well 60% of miner are probably dumping their coins there causing the volume to increase(after a month you have 1800 x 30 = 54000 coins dumped, which is a big amount) more than any other exchange, it should explain it, even if we count the fake volume