What does the photographer mean by "iron fist" kung fu? How to practice?

The so-called photographer's hand skill is the ability to hold and control the camera and the ability to cooperate with the eyes. This ability directly determines the clarity of the usual photos, and the important moments also determine whether the wonderful moments can be captured in time and accurately. Exercise your hand skills with perseverance. In addition to practicing shooting, we should also appropriately increase sports training, constantly enhance arm strength, physical strength and endurance, so as to develop excellent hand skills.