2. When an athlete commits a foul for the first time after being warned, the referee can show a red card and a yellow card to award the opponent a point. .
Bad behaviors that are punished include: intentionally damaging equipment, using a game ball or hitting the table with a racket; Shouting or swearing; Delaying the game, deliberately hitting the ball out of the competition area, and repeatedly ignoring the regulations prohibiting off-site guidance in the game. )
Once the referee gives a penalty, he should inform the referee, but the game will continue. If the athlete continues to behave badly after being punished, the referee should interrupt the game and report to the referee. Whether or not the referee's report is received, the referee can decide to take disciplinary action against the athletes who violate the rules, including disqualification from participating in the competition, the event or the whole competition.
3. The referee should show a yellow card when formally warning the athletes and a red card when disqualifying the athletes.
In the competition, if the player changes the racket without informing the referee and the opponent, the referee should immediately report the matter to the referee, who will give a warning to the first offender. If he does it again, the referee will disqualify him.
That's all I know.