Ali,
Great!
In the yik kam SLT kuen kuit.
It is said:
Line 1: Collect the yee or intention, meeting with the Shen or awareness , in the equal shoulder stance .
Line 5: Union in the (low) dan dien , du medirian, sink.
THe nature lower abs Breathing utube is the basic kung Fa or process to practice these two lines. Without the kung Fa or process Reveal, one can spend a life time to guess what it is but still don't know and not sure what it is. In the ancient Chinese tradition, With Kung Fa, one right away identify the phenomenon, that is called enter the door, that is the begining of inner door student.
For healing there are those who just practice standing in the neutral stance and practice the natural lower abs breathing for hour and get good health improvement results.
For those who practice the six healing sounds healing , the standing in neutral stance and natural lower abs breathing practice are a must prerequisite . Only after one can handle these prerequisite with ease in loose, quiet , and natural Way, then one is taught the six healing sounds. Everything is simple stuffs, but needs to be proceed step by step and master every step.