The traditional Chinese gateway is a scatter symbol that can be paid anywhere and reward you with multiples of the total bet, not just the coin value. Get three doors with 60 times the bet bonus, four points will pay 90x, and any five or more will get 150 times the bet.
The first thing to consider is the special 243 Ways to Win format. Unlike most slots, you need to match symbols to run across defined paylines, all three and more of the same symbols are located anywhere on the adjacent reels on the left. The math behind this format is simple, with five reels, each containing three symbols. Multiply by 3x3x3x3x3 and you get 243 possible winning combinations. If there is no payline, you need to have 30 coins per rotation.