[Location ] Localized in the proneness-position and the doctor rubs several times on the patient's back, the region that from the first to the twelfth thoracic vertebra, 0.3 cun -0.5 cun away from the posterior median line, and then find the reactive site, these sites are similar to topapules, protrude to skin slightly, and the color may be gray, brown, dark red, or plum, and the color will not faded when be pressd, these reactive sites are acupoints
 
[Regional Anatomy] Skin→subcutaneous tissue→superficial muscular layer (trapezius muscle, latissimus dorsi muscle, rhomboideus, serratus posterior superior, serratus posterior inferior)→deep muscular layer (sacrospinal muscle, transversospinal muscle). Superficial layer, the distribution of the medial cutaneous branches of the first thoracic nerves to thoracic nerves, and the concomitant arteries and veins; deep layer, muscular branches of the first rami posteriores nervorum thoracalium to the first rami posteriores nervorum lumbalium, intercostal arteries and verins or the branches and the subordiantial ramus of lumbar arteries and veins' dorsal branches.