How did Andy Lau finally tell Ma Jiaowen that the water in Gambler 1999 was poisonous?

Before the last card, Ma Jiaowen said that he had won 20 gold medals. If the king had kept silent in the last hand, he would have lost twice. In fact, King doesn't have to lose 20 dollars, because King can't play 2 of spades in the penultimate game. He used the penultimate card to write "Water is poisonous", so it can be inferred from the penultimate card that KING kept his big penis for writing.

Ma Jiaowen fired him at least twice (it should have been a draw before), but KING also lived up to expectations and didn't want to lose to Ma Jiaowen without revealing his big plan, so he released Spades 2? Washed in Ma Jiaowen's hand, which means Ma Jiaowen can't play spades 2 to save the mirror? I won Ma Jiaowen in this way.

Extended data:

Liar is a film produced by Hong Kong Huaxing Group Co., Ltd. on February 1998+08 18. The film is directed by Jing Wong, starring Andy Lau, Nick Cheung and Athena Chu.

The film tells the story of Lao Zheng A Wang, who gambled for a living, was sentenced to five years in prison for manslaughter, and then released from prison. Accompanied by the dragon, he returned to the rivers and lakes and had a legendary gambling game with the gambling king Ma Jiaowen.

References:

Baidu encyclopedia-gambler 1999