This is a form of Chinese medicine to help increase energy, alleviate pain and ease fatigue, which sounds like a miracle to me.
When doing this you will move into specific physical postures to help ease tension over your whole body.
It is similar to the theory of yin-yang, qi was derived from ancient Chinese philosophy, which believes everything is related.
In traditional Chinese medicine, qi is treated as the fundamental substance of the human body, and its movements explain various life processes. Qi in its physiological sense constitutes, replenishes and nourishes the human body.
Qi is often called vital energy because it is believed to be the motive energy derived from the essential substance for various vital processes.
You can find out more from this website on ‘Traditional Chinese Medicine Information Page,