The red koi fish is the wild symbol. It can substitute for all the symbols and it will double payouts when it contributes to a win.
The scatter symbol is a group of four Chinese characters and it offers payouts of up to 100x the total bet for the spin.
The slot's main bonus feature is the Dragon Jackpot game. The game gives you the chance to win one of four progressive jackpots and it can begin any point while playing. Best of all, once it starts you are guaranteed to win one of the jackpots.
In the game you need to spin a wheel of fortune that has different coloured segments. Each colour represents one of the jackpots and you win the corresponding jackpot once you have landed on the same colour three times.
Nian Nian You Yu offers a top payout of 10,000x if you can land five purple dragons across a payline. The second dragon can payout up to 5,000x, the fruit and table can payout up to 1,000x, the two food dishes can payout up to 300x, the lantern and firecrackers can payout up to 200x, and the Chinese characters and flowers can payout up to 50x.