Staying 10 days in Hong Kong for studies, do I need a Visa?

Dear All, I am currently a student of UNSW (AGSM MBA) in Sydney and UNSW have a campus in Hong Kong in which I will be doing some further studies for a 10 days pediod in January next year. I hold a Brazilian passport and would like to knowwhether there is any requirement for me.
Thank you in advance
Rafael