Contact this place and find out the latest regulations. I suggest you make this call with the help of someone who speaks Chinese. Also ask them for the price of the z visa. Good luck!

Ministry of Foreign Affairs of The PRC.
5th Floor, Lower Block,
26 Harbor Road, Wanchai, Hong Kong.
Tel: 25851657,25851680,25851794.

More general information about the z visa here: http://www.china-embassy.org/eng/hzqz/zgqz/t84245.htm