This can only be called a lucky ball. If you score on the inside, you will lose on the outside.

For the master, most of the balls played by the racket frame in the game are tactics deliberately used for scoring. The rest of the hitting methods basically do not use the racket frame to hit the ball, unless there is a mistake.

For amateurs, unless you also want to practice hanging or chopping, try to avoid the ball being hit by the racket frame. Good basic ability can realize future development!

I hope my answer is helpful to you!