Touching the ball means that the ball hits the edge of the table. In the actual competition, there are two kinds of edge balls: one is that the ball touches the roof of the table to score, and the other is that the ball cannot score when it touches the roof of the table. It refers to avoiding sharp edges and main problems in conversation or action or comparing doing things on the edge of a specified border without violating the rules to playing the edge ball. Also refers to the existence of luck and the desire to succeed by luck.
Usually, players don't intentionally miss the ball, because it is impossible for players to calculate the exact landing point of the ball, and there will be some errors more or less, so they don't intentionally miss the ball.
However, in table tennis matches, you can often see the lens of hitting the ball. The so-called edge ball is that the ball touches the side table and changes the normal direction of the ball, or the ball touches the table when it falls, but it does not rebound directly. Usually this situation is unexpected to the batter and catcher in advance. Therefore, we can notice that when the batter touches the ball, he often reaches out and apologizes to the catcher.