Jin
Means trained and educated force. It is the use of brute force and stiffness
which should be avoided.
Jin can be yin or yang, hard or soft,defensive or offensive, short or long distance, high or low.
It should be elastic.this allows changes between hard and soft or vice
versa when defending or striking.
When not in contact look, redirect/disperse,strike
When in contact listen,redirect/disperse and strike
Chi
Means breath, respiration and circulation. the energy created by oxygen
moving into the cells of the body and then being used by the body can be
called chi. If the supply of chi (air,food,water) is poor there wil be a
lack energy and health.
The use of chi power is no different from any other good fighting style.
i.e. exploiting the opponents weakness, not using force against force, using
correct technique and good body dynamics more than using muscular strength.
Until the beginning of the 20th century no martial style has been
identified as'internal'. It was sun lu tang of the sun style who publicized
this classification in his books.
Chi kung/nei kung training supports the regular tai chi system practice.
and this type of auxrilly training can be internal,external,hard,soft,
theraputic,medative,health or martial. or a mixture of all of these.