US passport holder applying for China z visa in Hong Kong

Hello!

I am a US citizen looking for apply for a China Z-type. I have a company to sponser me and the relevant paperwork. What I want to know is if I am able to apply for a China z-type in Hong Kong either through mail or in person. I have read in the Q&A section that you can but that post was in way back in 2011. I have heard that many Hong Kong visa regulations have changed since then and I want to get the most up to date information. Thank you!