On the abdomen, from the chin, the length of the head is multiplied by the position of 0.6 18 (most people are in the middle of the eyebrows).

On cloudy days, the length of the trunk is multiplied by the position 0.6 18 away from the shade (most people are in the middle of the nipple).

The lower abdomen, from the foot, is multiplied by the position of 0.6 18 (most people are near the navel).

As long as you study it carefully, you will also find that several other major acupoints in the human body are related to the golden section.