I want to visit the Airshow China 2016. How do I get the entry pass or ticket?

I am from Melbourne, Victoria, Australia. I would like to visit the Airshow China 2016. How do I get an entry pass or ticket to see the airshow? Who should I contact to get the entry pass? Do they need volunteers to help during the Airshow China (just like what we did in Avalon Airshow in Melbourne)?