5 Dragon is one of the most popular slot machines in Macau, it's made by Australian company Aristocrat.
http://243wayslots.com/slots/aristocrat/5-dragons-slot/
Here's the paytable I found showing on the machine:
image1.jpg

What's the percentage of catching 3 scatters?
Which dragon is the optimal option to choose when showing 5 dragons(free spin)?
What's the house return for all kinds of combination of play?
I
want to know everything about this game!

My father doesn't understand the concept of advantage play. He has been highly addicted to this game for 6 years, it jeopardizes my family's wealth, so this is a serious issue for me!
I want to know the very detail of this game, and help him understand the game and lose interest in it after understanding the disadvantage. However, I can't find any useful information about this game.