Im from Bolivia, do I need visa and can I get it on arrival and how much do I have to pay, thanks.

I'm a pilot living in Thailand and I need to do an assessment for an Airline, The interview and simulator assessment will be held at the Zhuhai Flight Training Centre, I will have a letter from the Airline showing this, woud you tell me please what documents do I need to show and can I get an on arrival entry permit, thanks.