mahjong bug ??

u guys see the left hand side player who game

is it a bug or wat. he listen 4 7 bamboo but he game 4 wan.

how come ? or becuase he got 7 flower ?

btw this game is gamebuffet

y bo lang reply me ~~~~

你爸我 is play wahjong one.

maybe he learn from the ppl in the 7pm chn 8 weekday drama