0.2–0.3 cun obliquely in a superior direction.
Chengjiang REN-24 is mostly applied to expel Interior Wind which gives rise to mouth and facial paralysis. Other typical symptoms include hemiplegia, deviation of mouth, lockjaw, epilepsy and tetany.
On the other hand, it is also able to remove the Obstructions in the Directing Vessels along its internal pathway (around the mouth and to the lower eyes). Thus it treats pain and numbness of the face, face swelling, toothache, gum pain, purple lips and sudden lose of voice.