CHAN ZUO. YANG SHEN
In the second stage, we begin to practice middle Dantian. Sometimes this area is called “window to the sky”. It is located in the center of the chest at the level of the nipples. Its function is to transform energy into Shen (mind, consciousness and soul), and to increase the mind power. This inner strength gives us confidence, allows us to finish what we have started, and gives us a state of calm and quiet joy.
Also in the middle Dantian is the region where thymus gland is located. Therefore, this exercise helps to strengthen the immune system and increases resistance to diseases.