（灵枢五十营篇 全）
黄帝曰∶余愿闻五十营奈何？岐伯答曰∶天周二十八宿，宿三十六分，人气行一周千八分。（五十营者，即营气营运
之数，昼夜凡五十度也。以周天二十八宿，宿三十六分相因，共得一千零八分。人之脉气，昼夜营运一周，亦合此数。）
日行二十八宿，人经脉上下左右前后二十八脉，周身十六丈二尺，以应二十八宿，漏水下百刻，以分昼夜。（二十八宿义
见前章。人之经脉十二，左右相同，则为二十四脉，加以跷脉二，任督脉二，共为二十八脉，以应周天二十八宿，以分
昼夜之百刻也。二十八脉及十六丈二尺详义见前十七。）故人一呼脉再动，气行三寸，一吸脉亦再动，气行三寸，呼吸定
息，气行六寸。十息气行六尺，日行二分。（人之宗气积于胸中，以行呼吸而通经脉，凡一呼一吸是为一息，脉气行六寸，
十息气行六尺。其日行之数，当以每日千八分之数为实，以一万三千五百息为法除之，则每十息日行止七厘四毫六丝六
忽不尽。此云日行二分者，传久之误也。下仿此。呼吸脉再动，详脉色类三，所当互考。）二百七十息，气行十六丈二尺，
气行交通于中，一周于身，下水二刻，日行二十五分。（凡一百三十五息，水下一刻之度也，人气当半周于身，脉行八丈
一尺；故二百七十息，气行于身一周，水下当二刻，日行当得二十分一厘六毫为正。）五百四十息，气行再周于身，下水
四刻，日行四十分。（气行二周，脉行三十二丈四尺，日行当得四十分三厘二毫为正。上文言二十五分者太多，本节言四
十分者太少，此其所以有误也。）二千七百息，气行十周于身，下水二十刻，日行五宿二十分。（气行十周，脉行一百六
十二丈，日行当得五宿二十一分六厘为正。）一万三千五百息，气行五十营于身，水下百刻，日行二十八宿，漏水皆尽，
脉终矣。（此一昼夜百刻之总数，人气亦尽而复起矣。）所谓交通者，并行一数也。（此释上文交通二字之义。并行一数，
谓并二十八脉通行一周之数也。）故五十营备，得尽天地之寿矣，凡行八百一十丈也。（使五十营之数常周备无失，则寿
亦无穷，故得尽天地之寿矣。八百一十丈，脉气周行昼夜五十营之总数也。）
《灵枢·五十营》篇（全文）
黄帝说：我希望听听关于“五十营”的道理是怎样的？岐伯回答说：天体运行涵盖二十八宿，每宿对应三十六分，人体之气运行一周为一千零八分。（所谓“五十营”，即指营气在体内循环运行的次数，昼夜共运行五十周。以周天二十八宿，每宿三十六分相乘，共计一千零八分。人体的脉气，昼夜营运一周，也符合这个数值。）
太阳每日运行经过二十八宿，人体的经脉包括上下左右前后共二十八条，总长度十六丈二尺，以此对应天上的二十八宿；漏壶滴水一百刻，用来划分昼夜。（二十八宿的含义见前章。人体的经脉有十二条，左右对称，所以是二十四条脉，再加上跷脉两条、任脉和督脉各一条，总共二十八条脉，以此对应周天的二十八宿，并划分昼夜的一百刻。二十八条脉及十六丈二尺的详细含义见前文第十七节。）因此，人每次呼气时脉搏跳动两次，气行三寸；每次吸气时脉搏也跳动两次，气行三寸。一呼一吸之间称为一“定息”，气行六寸。十次呼吸，气行六尺，太阳日行二分。（人的宗气积聚在胸中，推动呼吸并贯通经脉。凡是一呼一吸称为一息，脉气运行六寸，十息气行六尺。其日行的数值，应当以每日一千零八分为实数，以一万三千五百息为除数进行计算，则每十息日行仅七厘四毫六丝六忽有余。这里说日行二分，是流传已久的错误。下文仿照此例。呼吸时脉搏跳动两次，详见《脉色类》第三部分，应当互相考证。）二百七十息，气行十六丈二尺，气在体内交通循环，在身体内运行一周，漏壶水下两刻，日行二十五分。（凡是每一百三十五息，对应漏水下一刻的度数，人气应当在身体半周，脉行八丈一尺；所以二百七十息，气在身体运行一周，漏水应当下两刻，日行应当得二十分一厘六毫才是正确的。）五百四十息，气在身体再运行一周，漏壶水下四刻，日行四十分。（气行两周，脉行三十二丈四尺，日行应当得四十分三厘二毫才是正确的。上文说二十五分太多，本节说四十分太少，这就是其中的错误所在。）二千七百息，气在身体运行十周，漏壶水下二十刻，日行五宿二十分。（气行十周，脉行一百六十二丈，日行应当得五宿二十一分六厘才是正确的。）一万三千五百息，气在身体运行五十营，漏壶水下百刻，日行二十八宿，漏水全部流尽，脉气运行结束。（这是一昼夜一百刻的总数，人气也在此耗尽并重新开始。）所谓“交通”，是指并行且数量一致。（这是解释上文“交通”二字的含义。并行一数，指的是二十八条脉共同通行一周的数量。）所以五十营完备，就能享尽天地的寿命了，总共运行八百一十丈。（如果五十营的次数经常周全无失误，那么寿命也就无穷无尽，所以能享尽天地的寿命。八百一十丈，是脉气昼夜五十营运行的总数。）
*Ling Shu: Fifty Cycles* Chapter (Full Text)
The Yellow Emperor said: I wish to hear about the principle of "Fifty Cycles" (Wushi Ying). Qibo replied: The heavens encompass twenty-eight mansions (Ershiba Xiu), each corresponding to thirty-six parts; the Qi of the human body circulates one cycle covering one thousand and eight parts. ("Fifty Cycles" refers to the number of times Ying Qi (Nutritive Qi) circulates in the body, totaling fifty cycles during day and night. Multiplying the twenty-eight celestial mansions by thirty-six parts per mansion yields one thousand and eight parts. The Qi of human meridians circulates one cycle over day and night, also conforming to this number.)
The sun travels through the twenty-eight mansions daily; the human meridians, including those above, below, left, right, front, and back, total twenty-eight vessels with a combined length of sixteen zhang and two chi, corresponding to the twenty-eight celestial mansions. The clepsydra (water clock) drips for one hundred ke (ke), dividing day and night. (The meaning of the twenty-eight mansions is seen in the previous chapter. The human body has twelve primary meridians; being symmetrical on left and right, they amount to twenty-four vessels. Adding the two Chong (Vigour) vessels, plus the Ren (Conception Vessel) and Du (Governing Vessel), totals twenty-eight vessels, corresponding to the twenty-eight celestial mansions and dividing the hundred ke of day and night. Details on the twenty-eight vessels and the length of sixteen zhang and two chi are found in Section Seventeen of the previous text.) Therefore, with each exhalation, the pulse beats twice, and Qi moves three cun; with each inhalation, the pulse also beats twice, and Qi moves three cun. Between the end of exhalation and inhalation (Ding Xi), Qi moves six cun. In ten breaths, Qi moves six chi, and the sun moves two fen. (Zong Qi (Pectoral Qi) accumulates in the chest, driving respiration and penetrating the meridians. One exhalation and one inhalation constitute one Xi (breath unit); Qi moves six cun per Xi, so in ten Xi, Qi moves six chi. Regarding the solar movement calculation: taking the daily total of one thousand and eight parts as the dividend and thirteen thousand five hundred Xi as the divisor, the sun moves only seven li, four hao, six si, and six hu per ten Xi. The statement here that the sun moves two fen is an error propagated over time. The following follows this pattern. Pulse beating twice per breath is detailed in *Mai Se Lei* Part Three, which should be cross-referenced.) At two hundred and seventy Xi, Qi moves sixteen zhang and two chi, circulating internally within the body, completing one cycle around the body, the water clock drops two ke, and the sun moves twenty-five fen. (Every one hundred and thirty-five Xi corresponds to the water clock dropping one ke; at this point, human Qi should be half-way around the body, moving eight zhang and one chi. Thus, at two hundred and seventy Xi, Qi completes one cycle around the body, the water clock drops two ke, and the sun should move exactly twenty fen, one li, and six hao.) At five hundred and forty Xi, Qi completes another cycle around the body, the water clock drops four ke, and the sun moves forty fen. (Qi moves two cycles, meridians move thirty-two zhang and four chi; the sun should move exactly forty fen, three li, and two hao. The previous text stating twenty-five fen was too much, and this section stating forty fen is too little; this is where the error lies.) At two thousand seven hundred Xi, Qi moves ten cycles around the body, the water clock drops twenty ke, and the sun moves five mansions and twenty fen. (Qi moves ten cycles, meridians move one hundred and sixty-two zhang; the sun should move exactly five mansions, twenty-one li, and six hao.) At thirteen thousand five hundred Xi, Qi performs fifty Ying (cycles) around the body, the water clock drops one hundred ke, the sun traverses the twenty-eight mansions, the water clock runs dry, and the meridian circulation ends. (This is the total count for one day and night of one hundred ke; human Qi also exhausts itself and begins anew.) What is meant by "Jiao Tong" (intercommunication/circulation) is that they proceed together with equal numbers. (This explains the meaning of "Jiao Tong" in the previous text. Proceeding together with equal numbers refers to the count of all twenty-eight vessels passing through one complete cycle together.) Therefore, when the fifty Ying are complete, one can attain the full lifespan of heaven and earth, having traveled a total of eight hundred and ten zhang. (If the number of fifty cycles is always complete and without error, then lifespan will be infinite, thus attaining the full lifespan of heaven and earth. Eight hundred and ten zhang is the total distance traveled by meridian Qi during fifty Ying cycles over day and night.)