Hi I have massive problems with BTCChina, while funding Bitcoins was really easy, its not possible to withdraw Bitcoins, I get a "failure" to do so though I was doing anything like requested.
Withdrawing money was also denied, because of the "Branch" was not set correctly.
Moreover the Support is not answering to e-mails nor its possible to reach someone through QQ, its says all the time that more than "100 people are looking for help before me.
I don´t know how this exchanger is being used by normal people, due it seems like nothing its working correctly.
As far as I know none of Chinese exchange give email support even they claim they do, if you want to trade in China, forget email support. Please correct me if you know one does give email support.
I used BTCChina many times myself luckily I haven't got any problem yet. Also I tried to contact their QQ support many times, NEVER got any human response.
I also called their phone number, they always hung up on me.
The only thing we can do is please copy and paste the error/deny message in Chinese maybe we can help you. Also did you try to withdraw to your tenpay, alipay or bank card.