Fan → Base charge U

f (fans)	U

Self-draw (自摸)

Winner is East	each of 3 losers pays 4U
Winner is not East	East pays 4U · others pay 2U

Discard (放炮)

Winner is East	discarder pays 4U · non-discarders pay 2U
Winner not East, East discards	East pays 4U · others pay 1U
Winner not East, non-East discards	discarder pays 2U · East pays 2U · remaining pays 1U

Dealer rotation

Dealer repeats on win or draw. Otherwise passes to next seat.