In regards to the original post-
You don't have to know these specifics and details. Everything is energy, whether emotional or physical. It can get very complex, separating from the simple process of the practice of qigong, which is different, perhaps, then the study of qigong. Master Lin is showing us how to practice qigong. This is a concept, and part of what is being imparted. Practicing qigong is a 'state of being'. It can be a transformational state. Simply coming into health and wholeness(completely, not just the physical body).
There must be a reason these details, are not included in the courses. It must be something to do with keeping it simple, and the way to 'practice' qigong. Sometimes too, answers come with practice , from the inside.
I would encourage, anyone you do a healing session on/with, to 'practice' qigong too. It is an ongoing process. The Process, I suspect, is much greater, and more eternal than the more obvious end of this. The having a body and blockages part. When you practice qigong, you are in a natural state of being. The rest takes care of itself.
love,
gallen