Win: 4 sets + 1 pair, at least 5 fan including the winner's +1 (so 4 fan in the hand). Calling Hu short is a false win (Gong Hu): you pay $4.00 to each player.
Jokers are wild and can stand in for any tile. You may instead discard one on your turn to bank +1 fan.
上: only the next player may take a discard to complete a run (e.g. 3-4-5). Anyone may pong or kong. Hu beats pong/kong, which beat 上. You may pong with one real tile plus a 飛, but a player ponging with two real tiles takes priority.
Joker swap: on your turn, if you hold the real tile that the 飛 in your own pong stands in for, swap it in and take the 飛 back to use elsewhere.
Instant 爆: Heavenly hand 天糊 (dealer wins on the opening 14 tiles) · Earthly hand 地糊 (win on the very first discard) · all honours · fully concealed · no flowers/animals · last wall tile · four great winds · big three dragons. 10 fan or more is also 爆.
Fan: winner +1 · small three dragons 5 · dragon pong 1 · pure Dots +2 · 東東東 2 for East seat, 1 for others · your own seat wind (南/西) 1 · 北北北 1 for all · seat flower/season 1 · No.4 flower/season 1 · animal 1 · 人头 1 · Joker discarded 1 · win on replacement 花上糊 1.
Money (10¢ per fan): 自摸 each opponent pays fan × 2 × 10¢; 吃牌 the discarder pays fan × 3 × 10¢. 爆 pays $4.00 from each on 自摸, $6.00 from the discarder otherwise. Kong: $1.00 from each opponent, paid instantly.