What Is Jing
There is many different types of Jing. I will give you a list of them.
As the student develops the core peng strength, work is begun on building a good connection and communication between student and opponent. Through the aid of practice to increase sensitivity, the student can precisely detect the opponent's power, center of gravity, direction, pressure, etc., as if actually hearing the vibrations.
Understanding Power (Tong Jing) motivation, one can continue developing and advancing listening ability to the stage of under standing power. In other words, the mind becomes able to analyze and measure the pressure, director character, speed, force, etc., of the opponent's movements in order to be able to cope with them properly.
Usually with the initial contact between two people in a free-style fighting situation, the student can use peng to sense the opponent's hand (with advanced students the sensitivity will encompass the entire body) an there is an almost magnetic feeling. T hat is, the opponent feels as if he were attracted or stuck to the student almost like chewing gum can stick to the body. The special application of sticking power is the slowing of an opponent's speed.
Success in sinking power development can cause one's opponent to feel that it is impossible to uproot the student. The relaxed, connected body is the source of this.
*** Note: This application is similar to some of the joint locks used in harder styles. While the external appearance may be similar, the difference lies in the Taiji student's non-use of physical strength, relying rather on the whole-body skills; this type of power can also be applied anywhere on the body.