Z visas aren't easy to get in HK as the mainland authorites require foreigners to obtain them in their homelands.

I don't know about Chongqing, but aside from the Olympics period, there has never been any problem getting a Z visa in Hong Kong.

http://www.fmcoprc.gov.hk/eng/zgqz/bgfwxx/default.htm

The same message is still on, but note that is from 2008. When I did the visa run from Changsha in 2009 I went to above mentioned PRC office and got it same day for 700, and an Aussie teacher who went with me just gave his paperwork to China Travel Service and also received his Z visa. I'm just curious as to what is going on in CQ?

Cheers and caffe lattes all around,\
IM