Grasping the hand is to subdue the other person so that it cannot attack you. Its main feature is to specialize in the fragile parts of the human body with dexterous methods, which is very powerful. You can look at Wang Zhanjun from Chen Taiji. He can grasp the hand well and is very practical in the experiment. But it is difficult to master it completely, specializing in fragile parts such as fingers, wrists and elbows. And the uniform effect can be achieved with a little force, among which, shoulders and wrists.