Application For A China Visa.

I hold a Malaysian Passport with a Permanent Resident status in Australia. I am living in Perth. My present Category M China Visa with Multiple Entries and 60 Days Duration of Each Stay will expire on 27th March 2020. I am a Consultant for a Mattress Manufacturing Company in China and wish to apply for a Category M China Visa with Multiple Entries and 90 Days Duration of Each Stay. Can I apply for this Visa in Perth? How much is the Application Fee? How long to obtain the Visa? Thank you.