条文：
『素门·骨空论』曰：督脉者，起于少腹以下骨中央，女子入系廷孔，
其孔溺孔之端也。其络循阴器，合篡间，绕篡后，别绕臀，
至少阴与巨阳中络者，合少阴上股内后廉，贯脊，属肾，与太阳起于目内眦，
上额，交颠上，入络脑，还出别下项，循肩髆，内侠脊，抵腰中，入循膂，络肾。
其男子循茎，下至篡，与女子等。
其少腹直上者，贯脐中央上贯心，入喉上颐，环唇，上系两目之下中央
（见图七十六）。
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条文：
督脉少腹骨中央，女子入系溺孔疆，男子之络循阴器，绕篡之后别臀方，
至少阴者循腹里，会任直上关元行，属肾会冲街腹气，入喉上颐环唇当，
上系两目中央下，始合内眦络太阳，上额交颠入络脑，还出下项肩髆场，
侠脊抵腰入循膂，络肾茎篡等同乡，此是申明督脉路，总为阳脉之督纲。
注：[1]督脉者，起于少腹下骨中央，谓男女少腹以下，横骨内之中央，
即女子入系廷孔之端，男子阴器合篡问也。
[2]男子阴茎尽处，精室孔、溺孔合并一路，合篡处也，
即女子胞孔、溺孔合并之处。
[3]廷孔之端，即下文曰：与女子等也。
[4]其络循阴器，合篡间，绕篡后行，是谓本络外合太阳中络也。
[5]别络绕臀，是谓别络内并少阴腹里也。
故经曰：至少阴与巨阳中络者，合也。
[6]至少阴者，循行上股内后廉，循腹里，与任脉上会于关元，
贯脊属肾，侠肾上行，与冲脉会腹气之街。故经曰：自少腹直上，
贯脐中央，上贯心入喉，上颐环唇，内行至督脉龈交而终，
外行系两目之下中央，循行目内眦，会于太阳。
[7]故经曰：与太阳起于目内眦，上额交颠上，入络脑，还出别下项，
循肩髆，内侠脊，抵腰中，入循膂，络肾，复会于少阴，
此督脉之循行也。
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Paragraph 1:
The *Suwen* (Plain Questions), chapter "Gu Kong Lun" (Discussion on Bone Holes), states: The Du Mai (Governing Vessel) originates from the central part of the bone below the lower abdomen. In women, it enters and connects to the Ting Kong (Court Aperture, i.e., the urethral opening). This aperture is the end of the urinary passage. Its collateral vessels follow the Yin Qi (external genitalia), converge at the Cuan Jian (between the anus and genitals), circle behind the Cuan, and another branch circles around the buttocks. It reaches the point where the Shaoyin (Kidney Meridian) and the Taiyang (Bladder Meridian) middle collaterals meet, converging with the Shaoyin meridian to ascend along the posterior medial aspect of the thigh, piercing through the spine, and attaching to the Shen (Kidneys). It meets the Taiyang meridian which originates at the Nei Zi (Inner Canthus of the eye), ascends to the forehead, crosses at the top of the head (Dian), enters to connect with the Nao (Brain), emerges again to descend separately down the Xiang (nape/neck), follows the Jian Bo (shoulder blade area), runs internally alongside the spine, reaches the center of the Yao (waist), enters and follows the Lv (muscles beside the spine), and connects with the Shen (Kidneys).
In men, it follows the Jing (penis), descends to the Cuan, being the same as in women.
The portion that rises straight up from the lower abdomen pierces through the center of the Qi (navel), ascends through the Xin (Heart), enters the Hou (throat), ascends to the Yi (chin/jaw), encircles the Chun (lips), and ascends to connect with the center below the two eyes (see Figure 76).
Paragraph 2:
The Du Mai originates at the central bone of the lower abdomen; in women, it enters and connects to the edge of the urinary aperture. In men, the collateral vessels follow the external genitalia, circling behind the Cuan and diverging towards the buttocks.
Reaching the Shaoyin meridian, it follows the interior of the abdomen, meeting the Ren Mai (Conception Vessel) as they ascend straight to the Guan Yuan (CV4) acupoint. It attaches to the Shen (Kidneys) and meets the Chong Mai (Penetrating Vessel) at the Fu Qi Zhi Jie (Abdominal Qi Street). Entering the throat, it ascends to the Yi (chin), encircling the lips appropriately.
Ascending to connect with the center below the two eyes, it begins to converge at the Nei Zi (Inner Canthus), connecting with the Taiyang meridian. Ascending to the forehead, it crosses at the top of the head, entering to connect with the Nao (Brain). Emerging again, it descends to the Xiang (nape), passing through the Jian Bo (shoulder blades).
It runs alongside the spine, reaching the waist, entering and following the Lv (paraspinal muscles), connecting with the Shen (Kidneys). The Jing (penis) and Cuan share the same origin and location. This clarifies the pathway of the Du Mai, serving as the general guideline for all Yang meridians.
Note:
[1] The Du Mai originates at the central bone of the lower abdomen, referring to the central part within the transverse bone below the lower abdomen in both men and women, which is the end of the Ting Kong (Court Aperture) in women and the convergence of the male external genitalia at the Cuan.
[2] At the tip of the male penis, the Jing Shi Kong (Sperm Chamber Aperture) and Ni Kong (Urinary Aperture) merge into one path, converging at the Cuan, which is the place where the female Bao Kong (Uterine Aperture) and Ni Kong merge.
[3] The end of the Ting Kong refers to what is stated below: "being the same as in women."
[4] When its collateral vessels follow the Yin Qi, converge at the Cuan Jian, and circle behind the Cuan, this is called the main collateral externally converging with the middle collateral of the Taiyang meridian.
[5] When the branch collateral circles the buttocks, this is called the branch collateral internally running parallel with the interior of the Shaoyin meridian. Thus, the classic says: "Reaching the Shaoyin and the middle collaterals of the Ju Yang (Taiyang)," meaning convergence.
[6] Reaching the Shaoyin meridian involves ascending along the posterior medial aspect of the thigh, following the interior of the abdomen, and meeting the Ren Mai at the Guan Yuan acupoint. Piercing the spine and attaching to the Kidneys, it ascends alongside the Kidneys and meets the Chong Mai at the Abdominal Qi Street. Therefore, the classic states: "From the lower abdomen rising straight up, piercing the center of the navel, ascending through the Heart, entering the throat, ascending to the chin, encircling the lips, moving inward to terminate at the Yin Jiao (DU28) acupoint of the Du Mai." Externally, it connects to the center below the eyes, follows the inner canthus, and meets the Taiyang meridian.
[7] Therefore, the classic states: "Meeting the Taiyang meridian originating at the inner canthus, ascending to the forehead, crossing at the top of the head, entering to connect with the Brain, emerging again to descend separately down the neck, following the shoulder blades, running internally alongside the spine, reaching the center of the waist, entering and following the paraspinal muscles, connecting with the Kidneys, and re-converging with the Shaoyin meridian." This is the circulation pathway of the Du Mai.