It's a he point, the last of the wu shu xue, corresponds to water, it is the point of humidity.
Localisation de Yinlingquan
Yinlingquan is located at the same height as Zusanli, on the other side, in a depression located under the internal tibial tuberosity (ITT).

Meridians and acupuncture points
Illustrated book: 183 points
Therapeutic functions and Clinical indications
- The point to use whenever there is humidity, regardless of its location;
- Local knee action.
Generally Yinlingquan disperses but as it is due to a deficiency of the spleen, we take other points like Taibai to tone it.