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The
four extremities are the tongue, teeth, nails and hair.
Tongue is the flesh extremity
Teeth are the bone extremity
Nails are the sinew extremity
Hair is the blood extremity
Qi is the main source of Jing, and Jing occurs when qi is manifested in these
four extremities. In order to fill up the qi and make it abundant, the qi must
be able to reach the ends of these four extremities. Only then can the qi reach
everywhere in the body and energize the entire physical body to its maximum
for fighting.
It is believed that the tongue is closely related to the muscles. If the tongue
is curved upward to touch the roof of the mouth, it will close the circuit between
the Conception (Ren) and Governing (Du) meridians and allow the qi to circulate
freely. This also allows qi to be built up. If you let this qi sink to and accumulate
in the Dan Tien below your navel, it will energize the muscles to a very high
level. The higher energy level will also raise your spirit of vitality and make
you braver.
In order to make the qi reach the hair, which is the extremity of the blood, you must first have plenty of oxygen to energize the blood to a higher state. Blood cells are the carriers of qi and oxygen. When blood cells are raised to a higher energy level, the qi will reach the hair.
The old translation say that the four extremities must be equal and strong. Then your normal behavior can be changed and you will be able to strike fear into your opponent. Like a tiger's hatred and dragon's fearsome power, the qi will issue following a sound in conjunction with the raising hand.
Pictured: Jiang Rong Qiao in Heng Quan
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