In a go competition, the contestant Chen Hua squeezed his knuckles from time to time, and the sound interfered with the opponent's thinking. During the interval between the closures of the game, the referee warned Chen Hua that if he squeezed his knuckles and made a sound again during the game, he would be ruled against the rules. In response, Chen Hua retorted that squeezing his knuckles was habitual and not intentional
In the go match, only the player's deliberate behavior can become the basis for punishment
he should not be convicted of violating the rules.