After the young Miyaki got conned by Any Lau's character and knelt before his father, the older Miyaki was practicing Chinese calligraphy with a brush pen and wrote the word "kill." But during the next shot when the word was seen from a 45 degree angle, you can see the word was written differently.
According to official poker rules and etiquette, it is absolutely prohibited for other people at the table to reveal information or make comments in any way in attempt to assist a player in a hand. Yet during the last hand of the final matchup, Miyaki's stepson and right-handed man were openly giving him suggestions. One said "I think he's got a straight flush," the other said "I think he's got a pair of kings." Blatant violation of poker rules.