Hi, I'm from Indonesia and I'm looking to get a Chinese VOA in Hainan and I have read from your points however i wanted to clarify some additional details 🙏:

it seems to me that the only requirements that make you eligible are a previously accepted/valid chinese visa, a returning
-ticket back to your original departure
airport(?)
-or just a departure away from Mainland
China in general(?)
-And a hotel booking for the duration of your
intended stay(?)
-or just a preliminary proof of booking will be
just fine?
I have also tried to call HAK airport (+86 898-6576 0114) through skype however i could not reach them (have not tried with landline) and ive also called SYX (+86 8989612333) which succeeded however when prvided with an English service option the operator was not able to speak English

So i have very little ways to confirm this information and not to mention to inquire about further details on the availability and possibility of creating a VOA.

Furthermore do you know of any other mediums or places in which I could contact the relating authorities and if not sensitive exactly where you source your info from Thank you so much 🙏