Can i apply for a Chinese working Z type in the USA if i am an Australian entering on a B1/B2 visa?

Hello,

I am going to be going to the USA for a few months and ill need to apply for a PRC working Z type that needs to be completed before late January 2016. Ill be entering USA on a B1/B2 card. I will be starting a contract in Shanghai starting February 2016. How long does the working process take?

Thank you