Hong Bao is a 5x4 video slot with 50 pay lines. A free spin bonus is triggered when 3 or more bonus symbols appear during the base game. There is also a Bonus Spins feature that is played when a sufficient number of Accumulation Symbols is accumulated. There are four different betting levels and each corresponds to a different multiplier for pays involving a multiplier wilds symbol and a different number of initial free spins when the free spins are triggered.
Game rules can be found within game.