孟春始至，黄帝燕坐，临观八极，正八风之气，而问雷公曰∶阴阳之类，经脉之道，五中所主，何脏最
贵？雷公对曰∶春甲乙青，中主肝，治七十二日，是脉之主时，臣以其脏最贵。帝曰∶却念上下经阴阳从容，
子所言贵，最其下也。雷公致斋七日，旦复侍
坐。帝曰∶三阳为经，二阳为维，一阳为游部，此知五脏终始。三阴为表，二阴为里，一阴至绝作朔晦，
却具合以正其理。雷公曰∶受业未能明。帝曰∶所谓三阳者，太阳为经，三阳脉至手太阴，弦浮而不沉，决
以度，察以心，合之阴阳之论。所谓二阳者，阳明
也，至手太阴，弦而沉急不鼓，炅至以病皆死。一阳者，少阳也，至手太阴，上连人迎，弦急悬不绝，此
少阳之病也，专阴则死。三阴者，六经之所主也，交于太阴，伏鼓不浮，上空志心。二阴至肺，其气
归膀胱，外连脾胃。一阴独至，经绝，气浮不鼓，钩
而滑。此六脉者，乍阴乍阳，交属相并，缪通五脏，合于阴阳，先至为主，后至为客。雷公曰∶臣悉尽意，
受传经脉，颂得从容之道，以合《从容》，不知阴阳，不知雌雄。帝曰∶三阳为父，二阳为卫，一阳为纪。
三阴为母，二阴为雌，一阴为独使。二阳一阴，阳明主病，不胜一阴，脉 而动，九窍皆沉。三阳一阴，
太阳脉胜，一阴不能止，内乱五脏，外为惊骇。
二阴二阳，病在肺，少阴脉沉，胜肺伤脾，外伤四肢。二阴二阳皆交至，病在肾，骂詈妄行，巅疾为狂。
二阴一阳，病出于肾，阴气客游于心，脘下空窍，堤闭塞不通，四肢别离。一阴一阳代绝，此阴气至心，上下
无常，出入不知，喉咽干燥，病在土脾。二阳三阴，至阴皆在，阴不过阳，阳气不能止阴，阴阳并绝，浮为
血瘕，沉为脓 。阴阳皆壮，下至阴阳，上合昭昭，下合冥冥，诊决死生之期，遂合岁首。雷公曰∶请
问短期。黄帝不应。雷公复问。黄帝曰。在经论中。雷公曰∶请闻短期。黄帝曰∶冬三月之病，病合于阳者，
至春正月脉有死征，皆归出春。冬三月之病，在理已尽，草与柳叶皆杀，春阴阳皆绝，期在孟春。春三月之
病，曰阳杀，阴阳皆绝，期在草
干。夏三月之病，至阴不过十日，阴阳交，期在 水。秋三月之病，三阳俱起，不治自已。阴阳交合者，
立不能坐，坐不能起。三阳独至，期在石水。二阴独至，期在盛水。
At the beginning of the first month of spring, the Yellow Emperor sat in leisure, observing the eight extreme directions, correcting the qi of the eight winds, and asked Leigong: Regarding the classification of Yin and Yang, the way of meridians, and what each of the five zang organs governs, which zang organ is the most noble? Leigong replied: In spring, corresponding to Heavenly Stems Jia and Yi and the color green, it primarily governs the Liver (Gan). The treatment cycle is seventy-two days; this is when the pulse governs the time. I consider this zang organ the most noble. The Emperor said: Reflecting on the *Shangxia Jing* (Classic of Upper and Lower) and *Yinyang Congrong*, what you call "most noble" is actually the lowest. Leigong fasted for seven days and attended again at dawn. The Emperor said: San Yang (Three Yang) serves as the Jing (Meridian/Channel), Er Yang (Two Yang) serves as the Wei (Maintenance/Support), and Yi Yang (One Yang) serves as the You Bu (Wandering Department); from this, one can understand the beginning and end of the five zang organs. San Yin (Three Yin) serves as the exterior, Er Yin (Two Yin) serves as the interior, and Yi Yin (One Yin) reaching its extremity resembles the New Moon (Shuo) and the Last Day (Hui); turning back to combine calculations establishes its principle. Leigong said: Having received instruction, I still do not clearly understand. The Emperor said: What is meant by San Yang is the Taiyang (Greater Yang) meridian serving as the Jing; when its pulse reaches the Lung Meridian of Hand-Taiyin (Shou Taiyin Fei Jing), it is wiry (Xian), floating (Fu), but not deep (Chen); decide with measurement, observe with the heart, and align with the theory of Yin and Yang. What is meant by Er Yang is the Yangming (Bright Yang) meridian; when its pulse reaches the Lung Meridian of Hand-Taiyin, it is wiry, deep, and urgent, without vigorous beating; if heat arrives, the disease will be fatal. Yi Yang is the Shaoyang (Lesser Yang) meridian; when its pulse reaches the Lung Meridian of Hand-Taiyin, it connects upward to the Renying acupoint (Renying, ST9), wiry and urgent, hanging like a thread without breaking; this is the disease pulse of Shaoyang, and if only Yin pulses appear, death ensues. San Yin is the master of the six meridians, intersecting with Taiyin; the pulse is hidden and beating but not floating, connecting upwards to the mind-heart (Zhi Xin). Er Yin reaches the Lungs, its qi returns to the Bladder, and externally connects to the Spleen and Stomach. When Yi Yin arrives alone, the meridians are severed, the qi floats and does not beat, and the pulse is hook-like (Gou) and slippery (Hua). These six pulses are alternately Yin and Yang, interweaving and combining, confusingly penetrating the five zang organs, aligning with Yin and Yang; the one arriving first is the host, the one arriving later is the guest. Leigong said: I have exerted my utmost sincerity, received the transmission of meridian knowledge, recited and obtained the Way of Congrong to align with the *Congrong* chapter, yet I do not know Yin and Yang, nor do I know the pairing of Yin and Yang (male and female principles). The Emperor said: San Yang is like the father, Er Yang is like the guard, Yi Yang is like the discipline. San Yin is like the mother, Er Yin is like the female, Yi Yin is like the sole messenger. When Er Yang and Yi Yang combine, Yangming governs the disease; if it cannot overcome Yi Yang, the pulse becomes agitated, and all nine orifices become sunken. When San Yang and Yi Yang combine, the Taiyang pulse prevails; Yi Yin cannot restrain it, causing internal chaos in the five zang organs and external manifestations of fright and terror. When Er Yin and Er Yang combine, the disease is in the Lungs; the Shaoyin pulse is deep, overcoming the Lungs and injuring the Spleen, affecting the limbs externally. When Er Yin and Er Yang both arrive together, the disease is in the Kidneys, manifesting as cursing and reckless behavior, and mania arising from disorders of the head. When Er Yin and Yi Yang combine, the disease originates in the Kidneys; Yin qi lodges in the Heart, the epigastric region and empty orifices are blocked like a dam, and the limbs feel separated. When Yi Yin and Yi Yang alternate and cease, this Yin qi reaches the Heart, moving up and down without constancy, entering and exiting without awareness, with dry throat and pharynx; the disease is in the Earth-Spleen. When Er Yang and San Yin combine, the Zhi Yin (Ultimate Yin) is present; Yin cannot exceed Yang, and Yang cannot stop Yin; when Yin and Yang both sever, a floating pulse indicates Blood Ma (blood mass), and a deep pulse indicates Pus Abscess. When Yin and Yang are both strong, descending to Yin-Yang, ascending to match the Brightness (Heaven), and descending to match the Darkness (Earth), one diagnoses the period of life and death, aligning with the beginning of the year. Leigong said: Please ask about the short-term prognosis. The Emperor did not answer. Leigong asked again. The Emperor said: It is in the *Jing Lun*. Leigong said: Please tell me the short term. The Emperor said: For diseases in the three months of winter, if the disease combines with Yang, when the pulse shows signs of death in the first month of spring, death will occur after leaving spring. For diseases in the three months of winter, if the pattern has exhausted itself, when grass and willow leaves die, if Yin and Yang are both severed in spring, the time of death is in the first month of spring. For diseases in the three months of spring, if Yang is killed, and Yin and Yang are both severed, the time of death is when grass dries. For diseases in the three months of summer, if Zhi Yin does not exceed ten days, and Yin and Yang intersect, the time of death is when water dries up. For diseases in the three months of autumn, if San Yang all arise, the disease may heal without treatment. If Yin and Yang intersect, the patient stands unable to sit, and sits unable to stand. If San Yang arrives alone, the time of death is when stone water freezes. If Er Yin arrives alone, the time of death is when waters are abundant.