If you're playing on your own, you can be as rude as you want. But at competition time he insists that people not read the riot act or insult the umpire.
他認為，平時玩時盡可隨便，但比賽時，態度一定要鄭重：不能講三字經，辱罵裁判，即使是開玩笑，也應該尊重對方。