Australian Citizens Currently in Hong Kong and Visiting Sanya next week

Hello,
I am reading a lot of conflicting information both on here and also on other internet pages. I am travelling with my partner from Australia. We are currently in HK and flying to Sanya and we land at Sanya Fenghuang International airport. I have organised all of the hotels myself for my stay.

Ok so the question is. Do I need to arrange for a visa prior to landing in sanya or can I apply for a landing VOA? I have asked my hotel and two staff members told me different requirements as did my airline. Any ideas anyone?