Well I'd love to share what I know and be of any assistance to the right people. Please understand that powers or siddhi is really more of A byproduct of spiritual cultivation. Yes these systems are more of a form of esoteric Kung fu then shamanism because you are pulling in forces from things around you to become more powerful but ultimately with most of these systems it is spiritual development. Kung fu means the merit of hard work nei Kung is the merit of years and years of deep meditative hard work. And there are many similarities with the long men Pai and it is a nei Gong system.