Mat is mainly to hone the sense of the ball and practice basic skills.

First of all, the posture should be correct, with the palms and fingers partially stacked, the wrists and thumbs together, and the thumbs together.

When catching the ball, stretch your hands forward and down, straighten your arms, press your hands down as much as possible, and hit the ball with your thumb or wrist. You don't need much strength to hit the ball, just keep your arms stiff.

When the incoming ball is eccentric, hit the ball with one hand, keep your arm straight and stiff, and hit the ball with the root of your thumb and forefinger. When the ball feels good, the whole arm can hit the ball.

The key is to find the sense of the ball, so practice more.