CV17 Atria of the Breast, also called Palace of the Heart Governor or Lake of Qi or Lake of Tranquility.

Drowsy emotions can be released, and congestion-related physical disorders can be resolved.
Keep your mind focused, breathe slowly and deeply, until you get a feeling of space, charge and flow in that area.
It is the point on the heart chakra that is placed exactly in the middle of all chakras and thus has a harmonizing function. The point can lead to a deep relaxation.

Position: In the middle of the breastbone, on the line of the fourth rib space (below the fourth rib), in men between the nipples.

Effects:

General:
CV17 balances too much energy (overheating) and too little (deficiency symptoms).
He leads to a deep breath. The pulse is balanced, it is not too hard and not too weak.
Studies have shown that KG17 can induce the autonomic nervous system to normalize the heartbeat.
CV17 strengthens the organs in the chest area.
TCM meaning:
Mu point (point for the pericardium)

Master point of the chest 

Connection point to pericardium, spleen, kidneys, small intestine and triple heater, ie a series of meridians.

Physically:
Helps with chronic fatigue, hormonal imbalance, heart problems, allergies (along with LI11, K27, St36), improves the immune system and regulates the thymus gland. He helps with asthma, in the recovery of injuries.

Psychic experiences:
The point calms down within a few minutes. It protects against negative, emotional problems. You can treat it yourself every day. He releases emotional stress and anxiety feelings. He soothes an upset mind and encourages relaxation. He helps with nervousness, depression, sadness.