Collect coins to unlock different bonus games in Chests of Cai Shen A 5×3 gameboard is filled with a series of Chinese luck symbols as well as green, red and purple coloured coins with a corresponding chest at the top of the board. Each time a coin appears it is collected in its respective chest, expanding the size of it and increasing the chances of hitting the bonus. Once players land at least six of the same coloured coin, the bonus game can be triggered.