Authentication of my master degree qualifications and my NZ justice dept criminal check

I am a New Zealand Citizen and passport holder, currently a University Teacher in Business in Chengdu at CDUT. They are currently processing my 'Z' visa application, but I will have to come to your embassy ( or can I have my wife visit for me ) in Wellington, to have my documents authenticated.
This will be : University degree originals with colour copies of each, and also my NZ Justice Department Criminal record check document.
How long will this process take at your embassy.
My wife can visit with these docs, which are in my home in New Zealand, plus a colour copy of my New Zealand passport for your reference.
Thanking You
Tony White