I holding an Australian passport, but residence in Thailand (my husband works here five years)

Hi,
My name is Kim. We will trave to Hongkong first 10days and then will go to mainland China, do we need to apply visa or can be exempt like Thais people? If need so where can I download an application forms or can you email me directly, as I will be in Vietnam on vacations and back to Bangkok need to be prepare first thanks.

Hope to heard from you soon.
Thanks, Kim