The left hand is used as an auxiliary hand, and the right hand exerts force. The basic posture is, thirty or ninety degrees. The arm is 90 degrees to the chest, the forearm is 90 degrees to the arm, and the palm is 90 degrees to the forearm (the palm is parallel to the ground, and the palm touches the ball with its fingers). When exerting force, the force is transmitted from the feet to the hands, so you should feel it as a whole, not just using the upper limbs to complete the action. The left hand should not follow, but it takes a long time of practice and experience. After a long period of practice, your movements may be a little distorted according to your feelings, but as long as you keep in mind the "three ninety degrees", you will be more accurate.

If you are right-handed, your left hand is your assistant (left-handed, on the other hand). From the left, your left hand should be near the lower right corner of the ball, and your right hand should be a strong hand. The plane formed by the forearm and the big arm is in the same plane as the basket (the basket is regarded as a particle first). The position of the left hand is "thirty or ninety degrees" according to the right hand. After the left hand is opened, there is a gap of 5 or 6 cm between the left thumb and the right thumb.