British Citizen with perm residencey to Australia, need a business visa to china for a few days only

Where's the best place to apply for a business type to china, I am a British Citizen with a british passport only at the moment. I have permanent residency status to Australia - where i will be flying from.
Also, my husband will be travelling with me to China, he is Australian Citizen with an Australian Passport.

We are only needing to be there on business for about 5 days. Single entry into China. Flying from Brisbane.