It's true that you need to submit visa application to China consulate in the Brown Street, but it is not easy. You need to prepare the below documents:
(1) One completed Visa Application Form with a passport size photograph attached;
(2) Your passport with at least 6-month validity and at least 2 blank visa pages;
(3) One of the following documents (original or photocopy):
a. Invitation letter from the competent office of the Chinese government.
b. Invitation letter from the host company in China.
c. Reference letter from the sending company in Australia.
d. Other documents that may help the visa application.

for 12 months multiple entry visa, you have to submit previous two F visa or multiple entry F visa on your passport, it is hard for fist-time applicants to get a 12 months multiple entry visa.