Vertically or obliquely 0.5–1 cun.
The Triple Burner is like the 'ambassador' through which the Original Qi comes out of the Kidneys and spreads to the five Zang and six Fu Organs and 12 Channels. BL-51 helps to regulates the Qi of the Triple Burner.
'Huang' refers to the space between the Heart and diaphragm which is near breasts. In fact it is indicated for many breasts related disharmony.