I've heard many, many reports that the authorities in Guangdong will not longer issue paperwork necessary for English Teacher job applicants to obtain a Z visa to anyone who is not from the US, the UK, Canada, Australia or New Zealand.

Actually, I met a few people from the UK who were unable to acquire a Z visa IN Hong Kong from Guangdong province.

Guangdong has a different rule, foreigners are required to go home to get police clearance first.