Just my opinion, and I can be wrong.
If you say sung means nothing, then you do not understand how to use it. If you are tense, your reaction time is slower.
Even if its slower by a milisecond, the other person will arive first. To test this put your arm against someone like in a single hand push hands position. It works better if thier faster than you, and thier not as sung.
Without warning, try to bring your hand down in a circle motion and touch your opponents belly.
If you are tense they will be able to feel it and follow you, or block and strike. If you are sung, they wont notice you moved your hand until you’ve already connected.
Those are just beginner level stuffs, as the chinese said, not even enter the hall.
there are more levels above what you are saying, until one reaches there, what you mention is good for demo…etc. but it really doesnt do much.
You say that words mean nothing, this is true. But were on an internet forum. If we cant explain what were doing in words, then no one will learn anything.
Sung has the level of loose as everyone can do as you describe above.
then the practice reach to the level of or one feather not add or levitate.
then the practice further into the level of or Forget the body
So, Sung as you describe is doing not much at all in the cultivation. very low level.
only after entering the level of levitate, one start to practice the multi-dimensional force vectors handling and lead to dong Jing or knowing the jing.
Power comes from body structure.
power doesnt comes from body structure.
In physics, power is the rate at which work is performed or energy is converted.
In the style I learned, we first, have proper, low stances, to develop the legs, then we go higher. we SINK so anything coming in can be redirected to earth. If you want me to elaborate I can suggest a couple training exercise. we use full body movement, so when the striking surface arrives, our whole body arrives.
Power comes from the ground, to the waist, out to the striking surface. waist generates power, and dantien generates power. We also expand and contract,
This above just show you are not in the Dong Jing level yet and doing the same with the external art people.
So, unless you get to the level of levitate, you will not know what it is like. no one can teach you that but it is a journey you have to walk yourself. for those who has been there it is simple and clear otherwise it totally doesnt make sense. we all go through that.
as for the 4 basic mechancis if the body doesnt aware of how to do that individually then the body doesnt really know what to do. so, transforming the body is a big part. and the ancient did that in Standing stake. it is not sung, sung is just the begining of the begining.
the sung before the level of levitation has not much use.