条文：
冲脉侠脐起横骨，大气四注肓俞同，商石阴通幽门穴，至胸散布任流行。
%
条文：冲脉分寸同少阴，起于横骨至幽门，上行每穴皆一寸，穴开中行各五分。
按：
任、督、冲三脉，『素问·骨空论』曰：任脉起于中极之下，毛际以上。
是外指少腹之分也。循腹里，是内指胞中也。督脉起于少腹以下骨中央，
女子廷孔，男子阴器，合篡贯脊属肾，亦是外指少腹，内指胞中也。
冲脉起于气街，并少阴之经。亦是指于胞中也；虽未明言胞中，
而实未尝不起于胞中也。是以知任、督、冲三脉，皆起于胞中。
然三脉皆后天水谷所化，胃气出于气街，会于胞中，与先天肾间动之真气，
并行而充身者也。由此观之，三脉同出一源无疑矣。
故王冰『内经』注、『甲乙经』、『针灸图经』以任脉循背者谓之督脉；
自少腹上谓之任脉，亦谓之督脉，则是以背腹阴阳，别为名目耳。
然冲脉亦起于胞中，并足少阴而上行。是任脉、督脉、冲脉乃一源而三岐者。
故人身之有腹背，犹天地之有子午；任督之有前后，犹二陆之分阴阳也。
胞中者，谓男女丹田之通称也，在女子谓之女子胞，在男子即精室也。
注：[1]冲脉起于足阳明，并于足少阴腹气之街，侠脐中行左右五分，
而上行自少腹下尖阴上横骨穴，从横骨穴上行大赫、气穴、四满、中注、
肓俞、商曲、石关、阴都、通谷、幽门等共十一穴，
每穴上行相去各一寸，中行左右各五分（图七十九）。
%
Translation:
The Chong Mai (Penetrating Vessel) runs alongside the navel, originating at Henggu (CV12), where the Great Qi circulates in four directions and connects with Huangshu (KI16). It passes through Shangqu (KI15), Shiguan (KI14), Yindu (KI13), Tonggu (KI12), and Youmen (KI15), reaching the chest where it disperses and flows together with the Ren Mai (Conception Vessel).
Translation: The measurement of the Chong Mai corresponds to that of the Foot-Shaoyin Kidney Meridian. It extends from Henggu (CV12) up to Youmen (KI15). Each acupoint is spaced one cun apart vertically, and the points are located five fen laterally from the midline.
Commentary:
Regarding the Ren Mai (Conception Vessel), Du Mai (Governor Vessel), and Chong Mai (Penetrating Vessel), the *Su Wen · Gu Kong Lun* states: "The Ren Mai originates below Zhongji (CV3), above the pubic hair." This externally refers to the lower abdomen. "Circulating within the abdomen" internally refers to the Baozhong (Uterus/Essence Chamber). The Du Mai originates from the central bone below the lower abdomen; in women, it is called Tingkong, and in men, the genitalia; they converge at the Cuian (perianal region), penetrate the spine, and connect to the Kidneys. This also externally refers to the lower abdomen and internally to the Baozhong. The Chong Mai originates at Qichuang (Inguinal Region) and runs parallel to the Foot-Shaoyin Kidney Meridian. This also refers to the Baozhong; although not explicitly stated as originating from the Baozhong, it indeed originates there. Thus, it is known that the Ren, Du, and Chong Mai all originate from the Baozhong. However, these three meridians are transformed from postnatal water and grain essence. Stomach Qi emerges from Qichuang, converges in the Baozhong, and runs parallel with the true Qi moving between the kidneys (pre-natal Qi) to nourish the whole body. From this perspective, it is undeniable that these three meridians share a common source. Therefore, Wang Bing’s commentary on the *Nei Jing*, the *Jia Yi Jing*, and the *Zhen Jiu Tu Jing* consider those circulating along the back as the Du Mai, and those ascending from the lower abdomen as the Ren Mai, also referred to as the Du Mai. This is merely distinguishing names based on the Yin-Yang attributes of the back and abdomen. However, since the Chong Mai also originates from the Baozhong and ascends alongside the Foot-Shaoyin Meridian, the Ren, Du, and Chong Mai are one source branching into three. Thus, the human body having front and back is like heaven and earth having Zi and Wu (North-South); the existence of front and back for the Ren and Du Mai is like the division of Yin and Yang by two lands. The Baozhong is a general term for the Dantian in both men and women; in women, it is called the Nüzi Bao (Uterus), and in men, it is the Jingshi (Essence Chamber).
Note: [1] The Chong Mai originates from the Foot-Yangming Stomach Meridian and runs parallel with the Qichuang of the Foot-Shaoyin Kidney Meridian, fifty fen lateral to the midline on both sides of the navel. Ascending from the lower abdomen, it starts at the Henggu (CV12) point above the pubic symphysis. From Henggu, it ascends through Dahé (KI12), Qixué (KI13), Simǎn (KI14), Zhōngzhù (KI15), Huāngshū (KI16), Shāngqū (KI15), Shíguān (KI14), Yīndū (KI13), Tōnggǔ (KI12), and Yōumén (KI15), totaling eleven acupoints. Each acupoint is spaced one cun apart vertically, and fifty fen lateral to the midline (Figure 79).