臣瑾曰∶夫针灸之术，其旨微矣。穴法之讹，其来远矣。如背俞、膏肓数穴，皆起死回
要穴，而折量分寸皆致讹谬。臣获善同陈先生亲授，一穴一法毫厘有据。且如背俞，前贤书
中皆云夹脊各寸半是，共折三寸，分二旁取之。
殊不知言夹脊，其夹字是除骨而言。若带脊骨，当以两旁各二寸，共折四寸分两旁。又
如膏
旁，按其酸疼处乃是真穴。臣每根据此灸疗，多获痊愈。又折量之法，世俗盗学，妄传自头部
、背部、手足背，一概用“同身寸”量之，殊不知头部有头部之尺寸，腹部有腹部之尺寸，
横直尺寸俱不同，各有其要，惟背部、手足部并用同身寸取之。学人于兹，不可不注意焉，
故书此以正之。
前发际至后发际折作十二节，为一尺二寸。前发际不明者，取眉心上行三寸；后发际不
明者，取大椎上行三寸；前后发际不明者，共折作一尺八寸。
横寸以眼内 角比至外 角，为一寸。头部横寸并用此法。
神庭至曲差、曲差至本神、本神至头维，各一寸半。自神庭至头维共四寸半。
大椎穴下至尾 ，共二十一椎，通折作三尺。
上七椎，每椎一寸四分一厘，共九寸八分七厘。
中七椎，每椎一寸六分一厘。
十四椎与脐平，共二尺一寸一分四厘。
下七椎，每椎一寸二分六厘。
第二行夹脊，各寸半，除脊一寸，共折作四寸，分两旁。第三行夹脊各三寸，除脊一寸
，共折作七寸，分二旁。
臣刘瑾说：针灸的技艺，其奥妙精深。穴位定位方法的错误，由来已久。例如背俞穴、膏肓穴等几个穴位，都是起死回生的重要穴位，但关于它们的折量分寸却都出现了谬误。我得到了陈先生亲授的正确方法，每一个穴位、每一种方法都有毫厘不差的依据。
就像背俞穴，前贤的书中都说距离脊柱两侧各一寸半，总共折算三寸，分在两旁取穴。殊不知“夹脊”中的“夹”字是指除去脊骨而言。如果带上脊骨计算，应当以脊柱两旁各二寸计算，总共折算四寸，分在两旁。
又如膏肓穴，世俗之人往往只按书本上的位置寻找，而真正的穴位是在按压时感到酸疼的地方。我每次根据这种方法进行艾灸治疗，大多能获得痊愈。
另外，关于折量方法，世俗之人盗学妄传，从头部、背部到手足背部，一概使用“同身寸”来测量。殊不知头部有头部的尺寸，腹部有腹部的尺寸，横向和纵向的尺寸都不相同，各有其要点。只有背部和手足部才统一使用同身寸来取穴。学习者对此不可不注意，因此写下这些内容以纠正谬误。
从前发际到后发际折算为十二节，相当于一尺二寸。如果前发际不明确，则从眉心向上量三寸；如果后发际不明确，则从大椎穴向上量三寸；如果前后发际都不明确，则总共折算为一尺八寸。
横向的一寸，以内眼角比至外眼角的距离为准。头部的横向尺寸都使用这种方法。
从神庭穴到曲差穴、曲差穴到本神穴、本神穴到头维穴，各为一寸半。从神庭穴到头维穴总共为四寸半。
上七节椎骨，每节长一寸四分一厘，共九寸八分七厘。
中七节椎骨，每节长一寸六分一厘。
第十四节椎骨与肚脐平齐，共二尺一寸一分四厘。
下七节椎骨，每节长一寸二分六厘。
第二行夹脊穴，距离脊柱两侧各一寸半，除去脊骨一寸，总共折算为四寸，分在两旁。第三行夹脊穴距离脊柱两侧各三寸，除去脊骨一寸，总共折算为七寸，分在两旁。
Minister Liu Jin stated: The art of acupuncture and moxibustion is profound in its principles. Errors in acupoint location methods have existed for a long time. For instance, the Back-Shu points (Back-Shu points, acupoints on the bladder meridian corresponding to internal organs) and Gaohuang (BL-43, Gallbladder Meridian) are vital points capable of reviving the dying, yet their proportional measurements have all been subject to errors. I received correct instruction directly from Mr. Chen; every point and method is based on precise measurements.
Regarding the Back-Shu points, ancient texts state that they are located 1.5 cun lateral to the spine, totaling 3 cun, divided between both sides. However, it is unknown that the character "jia" (clamp/adjacent) in "jia ji" refers to excluding the vertebral column itself. If including the vertebral column, the measurement should be 2 cun lateral to each side of the spine, totaling 4 cun, divided between both sides.
Similarly, regarding Gaohuang (BL-43), laypeople often search only according to book locations, whereas the true acupoint is found where pressing elicits soreness and pain. Whenever I treat using this method, recovery is frequently achieved.
Furthermore, regarding proportional measurement methods, common people steal and falsely transmit knowledge, applying "body-inch" (tong shen cun, a proportional measurement unit based on the patient's own body dimensions) uniformly from the head, back, to the dorsum of hands and feet. It is unknown that the head has its own dimensions, and the abdomen has its own dimensions; horizontal and vertical measurements differ, each having its specific key points. Only the back and the extremities (hands and feet) uniformly use body-inches for locating points. Learners must pay close attention to this, hence these writings are recorded to correct errors.
From the anterior hairline to the posterior hairline is measured as twelve segments, equivalent to one chi and two cun. If the anterior hairline is unclear, measure three cun upward from the midpoint of the eyebrows; if the posterior hairline is unclear, measure three cun upward from Dazhui (GV-14, Governing Vessel); if both anterior and posterior hairlines are unclear, measure a total of one chi and eight cun.
One cun horizontally is defined by the distance from the inner canthus to the outer canthus of the eye. This method is used for all horizontal measurements on the head.
From Shenting (GV-24, Governing Vessel) to Qucha (EX-HN4, Extra Point), from Qucha to Benshen (GB-13, Gallbladder Meridian), and from Benshen to Touwei (ST-8, Stomach Meridian), each measures 1.5 cun. From Shenting to Touwei, the total is 4.5 cun.
From Dazhui (GV-14) down to the coccyx, there are twenty-one vertebrae in total, measured as three chi.
The upper seven vertebrae: each measures 1.41 cun, totaling 9.87 cun.
The middle seven vertebrae: each measures 1.61 cun.
The fourteenth vertebra is level with the umbilicus, totaling 2.114 chi.
The lower seven vertebrae: each measures 1.26 cun.
The second row of Jiaji points (EX-B2, Extra Points adjacent to the spine): 1.5 cun lateral to the spine, excluding 1 cun for the spine itself, totaling 4 cun, divided between both sides. The third row of Jiaji points: 3 cun lateral to the spine, excluding 1 cun for the spine itself, totaling 7 cun, divided between both sides.