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Horizontal Cun: For the chest (Ying) and abdomen (Fu), the horizontal distance between the nipples is measured as eight cun. The abdomen should have horizontal measurements, all based on the above method.

Vertical Cun: From below the xiphoid process (Xinbi Gu) to the umbilicus along the midline is measured as eight cun. If a person lacks a xiphoid process, the distance from the sternal angle (Qigu) to the center of the umbilicus is measured as nine cun. From the center of the umbilicus to the pubic symphysis (Maoji Henggu) is measured as five cun.

From Tiantu (CV22) to Danzhong (CV17) is measured as six cun and eight fen; moving down one cun and six fen defines Zhongting (CV16). From Tiantu (CV22) upwards to Zhongting (CV16), the total measurement is eight cun and four fen.

All these measurements are taken using the "same-body inch" (Tongshen Cun) method.

Minister Liu Jin stated: The efficacy of acupuncture and moxibustion in removing disease lies solely in the manipulation techniques. If the acupoints are not located accurately, no therapeutic effect will be achieved; even if the acupoints are accurate, if the tonification and sedation methods are not applied correctly, it will also be futile.

Master Honggang said: The so-called tonification and sedation methods commonly known among the secular world, where tonification is defined by pushing the thumb outward and sedation by pushing the thumb inward, is extremely erroneous. What the general physicians call sedation is actually the tonification method in needle technique; what they call tonification is actually the sedation method in needle technique. Who does not know that for the left side of the body, there are left-side tonification and sedation methods, and for the right side, there are right-side methods, which should be treated according to the flow of Qi and Blood? If it does not conform to reason, who can cure the disease? Furthermore, it is stated in *Suwen* that some passages mention needling without moxibustion, and others mention moxibustion without needling. Quack doctors often combine both, alternating between needles and moxa. Later physicians, failing to understand the teachings of Huangdi and Qibo, resort to combining needles and moxa indiscriminately. Who does not realize that when the text states an acupoint is at a certain location, or specifies needling depth in fen or moxa moxibustion in zhuang, it implies conditional usage: if needling is used, apply the specified fen; if moxibustion is used, apply the specified zhuang. It means that if an acupoint is indicated for moxibustion, it should not be needled; if indicated for needling, it should not be moxibusted. However, current physicians, whenever performing moxibustion, invariably burn three zhuang first, then use needles, and then burn several more zhuang, calling this "penetration." While this practice aligns with the nature of mugwort fire, it fails to grasp the original intent of the texts and the profound principles of Huangdi and Qibo, which is deeply lamentable. As the saying goes, "The foolish love to act on their own presumptions," which is indeed justified. In the past, Master Honggang also often stated that only on the abdomen, when using needles, may one follow with a few zhuang of moxibustion to secure the acupoint; this is contraindicated elsewhere and cannot be applied uniformly. This represents the flexible adaptation of medical practitioners, a knowledge that must not be ignored.