maybe bitcoin because it is one of the coins that is widely used for payments like that even if it uses or can just use NEO because it says this coin is one of the countries of China
since the event is located in china, they may favour the use of NEO here. but since
BTC is popular worldwide, they may include it in their payment option.
but dont know if they will indeed add crypto payment option. normally, you can pay using debit/credit card in this kind of event. couldnt access their official website though. so dont know their accepted payment methods here.