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六气之本少阴午，太阴未，少阳寅，
阳明酉，太阳戌，厥阴亥。
歌曰∶
子君丑土卯金标，辰水犹偕巳木调。
申相亦原兹数内，余稽正化本然条。
天分五气，地列五行。五气分流，散于其上，经于列宿，下合方隅，则命之以为五运。
丹天之气，经于牛女奎壁四宿之上，下临戊癸之位，立为火运。
天之气，经于心尾角轸四宿之上，下临甲己之位，立为土运。
素天之气，经于亢氐昴毕四宿之上，下临乙庚之位，立为金运。
玄天之气，经于张翼娄胃四宿之上，下临内辛之位，立为水运。
苍天之气，经于危室柳鬼四宿之上，下临丁壬之位，立为木运。
此五气所经二十八宿，与十二分位相临，灼然可见，因此以纪五天而立五运也。戊为天门，
干之位也。己为地户，巽之位也。自房至毕十四宿为阳，主书；自昴至心十四宿为阴，主夜，通一日也。
若以月建法论之，则立运之因又可见矣。盖内者火之阳，建于甲己岁之首，正月建丙寅。丙
火生土，故甲己为土运。戊者土之阳，建于乙庚岁之首，正月建戊寅。戊土生金，故乙庚为金运。
庚者金之阳，建于丙辛岁之首，正月建庚寅。庚金生水，故丙辛为水运。甲者木之阳，建于戊癸
岁之首，正月建甲寅。甲木生火，故戊癸为火运。壬者水之阳，建于丁壬岁之首，正月建壬寅。
壬水生木，故丁壬为木运。是五运皆生于正月建干，岂非日月岁时相因而制用哉！
一说自开辟以来，五气乘承元会，运世自有气数，天地万物所不能逃。近世当是土运，是以
人无疾而亦痰，此与胜国时多热不同。（胜国时火运。）如俗称杨梅疮，自南行北，人物雷同。
土湿生霉（梅），当曰霉疮。读医书五
运六气。南北二政，岂独止于一年一时，而顿忘世会运元之统耶！
一人旅寓北方，夏秋久雨，天行咳嗽头痛，用益元散（滑石六两。甘草一两）姜葱汤调服，
应手取效，日发数十斤。此盖甲己土运湿令，痰壅肺气上窍，但泻膀胱下窍而已，不在咳嗽例也。
戊年楚地春瘟，人不相吊。予以五瘟丹投泉水，率童子分给，日起数百人。五瘟丹乙庚年黄
芩为君，丁壬年山栀为君，丙辛年黄柏为君，戊癸年黄连为君，甲己年甘草稍为君。为君者，多
一倍也。徐四味与香附紫苏为臣者减半也。七味生用为末，用大黄三倍，煎浓汤去渣熬膏，和丸
如鸡子大。朱砂雄黄等分为衣，贴金箔。每用一丸，取泉水浸七碗，可服七人。（歌曰；五瘟方
以运为君，肾柏心连肺用芩、脾草肝栀成五运，紫苏香附合为臣。大黄三倍煎膏和，鸡蛋丸兮服
七人。衣用雄黄、朱砂末，外加金箔更通灵。）
丹溪曰∶小儿痘证，陈文中用木香散、异功散温热之药，多因立方之时乃值运气寒水司天在
泉，时令又值严冬大寒，为寒气郁遏，疮不红锭，故用辛热剂发之。今人不分时令寒热，一概施
治，误矣。
一人年四十五岁，平生瘦弱血少，值庚子年岁金太过，至秋深燥金用事，久晴不雨，得燥证，
皮肤坼裂，手足枯燥，搔之屑起，血出痛楚，十指甲浓，反而莫能搔痒。予制一方，名生血润肤
饮。（用归、 、生熟地、天麦二门冬、五味、片芩、栝蒌仁、桃仁泥酒、红花、升麻，煎服十
数贴，其病如脱。大便燥结，加麻仁、郁李仁，后治十数人皆验。）
六气的“本”（根本之气）分别是：少阴对应午月，太阴对应未月，少阳对应寅月，阳明对应酉月，太阳对应戌月，厥阴对应亥月。
歌诀说：
子月为君火，丑月为湿土，卯月为燥金作为标；辰月为寒水，巳月为风木相互协调。
申月相火也源于这些数理之中，其余的正化规律自然条理清晰。
天分为五气，地列为五行。五气分流，散布于天空之上，经过二十八星宿，向下与十二地支方位相合，因此称之为五运。
丹天之气（赤色之气），经过牛、女、奎、壁四宿之上，向下临照戊、癸之位，确立为火运。
苍天之气（青色之气，原文缺字据上下文补），经过心、尾、角、轸四宿之上，向下临照甲、己之位，确立为土运。
素天之气（白色之气），经过亢、氐、昴、毕四宿之上，向下临照乙、庚之位，确立为金运。
玄天之气（黑色之气），经过张、翼、娄、胃四宿之上，向下临照壬、辛之位，确立为水运。
苍天之气（绿色之气，此处指代木运之气），经过危、室、柳、鬼四宿之上，向下临照丁、壬之位，确立为木运。
这五气所经过的二十八宿，与十二地支方位相互对应，清晰可见，因此以此记录天时并确立五运。戊位为天门，属于乾卦之位。己位为地户，属于巽卦之位。从房宿到毕宿共十四宿为阳，主白天；从昴宿到心宿共十四宿为阴，主夜晚，合起来代表一天。
如果以月建的方法推论，那么确立五运的原因也就显而易见了。大概内者（丙）是火的阳气，建于甲、己年的年初，正月建丙寅。丙火生土，所以甲、己年为土运。戊者是土的阳气，建于乙、庚年的年初，正月建戊寅。戊土生金，所以乙、庚年为金运。庚者是金的阳气，建于丙、辛年的年初，正月建庚寅。庚金生水，所以丙、辛年为水运。甲者是木的阳气，建于戊、癸年的年初，正月建甲寅。甲木生火，所以戊、癸年为火运。壬者是水的阳气，建于丁、壬年的年初，正月建壬寅。壬水生木，所以丁、壬年为木运。这五运都生于正月建干，难道不是日月岁时相互因循而制约运用吗！
另一种说法认为，自从开辟以来，五气乘承元会，世运自有气数，天地万物都不能逃脱。近代应当是土运当令，所以人即使没有疾病也会有痰湿，这与前朝（胜国时）多热证不同。（胜国时为火运。）比如俗称的杨梅疮，从南方传到北方，人和动物都类似感染。土湿生霉（梅），应当称为霉疮。读医书要懂五运六气。南北二政，难道仅仅局限于一年一时，而完全忘记了世会运元的统绪吗！
有一人在北方旅居，夏秋季节久雨，患上流行性咳嗽头痛，我用益元散（滑石六两，甘草一两）用姜葱汤调服，应手取效，每天排出数十斤痰涎。这大概是甲己土运湿令之时，痰湿壅塞肺气上窍，只需泻膀胱下窍即可，不属于普通咳嗽的治疗范畴。
戊年楚地发生春瘟，人们互相哀悼。我用五瘟丹投入泉水中，率领童子分发给众人，每天治愈数百人。五瘟丹在乙庚年以黄芩为君药，丁壬年以山栀为君药，丙辛年以黄柏为君药，戊癸年以黄连为君药，甲己年以甘草梢为君药。所谓君药，用量加倍。徐氏四味药配合香附、紫苏作为臣药，用量减半。七味药生用研末，加入三倍的大黄，煎浓汤去渣熬膏，和丸如鸡蛋大小。朱砂、雄黄等分为衣，贴金箔。每次用一丸，取泉水浸泡成七碗，可供七人服用。（歌诀说：五瘟方以运定为君，肾用黄柏心用黄连肺用黄芩脾用甘草肝用山栀构成五运，紫苏香附合为臣药。大黄三倍煎膏调和，做成鸡蛋大的丸剂供七人服用。外衣用雄黄、朱砂末，外加金箔更通灵。）
朱丹溪说：小儿痘疹证，陈文中使用木香散、异功散等温热药物，大多是因为立方的时候正值运气中寒水司天在泉，时令又正值严冬大寒，寒气郁遏，导致疮疡不红不硬，所以用辛热药剂发散它。现在的人不分时令寒热，一概施治，这是错误的。
有一人四十五岁，平生瘦弱血少，值庚子年岁金太过，到了深秋燥金当令，久晴无雨，得了燥证，皮肤开裂，手足干枯，搔抓后皮屑起落，出血疼痛，十个指甲增厚，反而无法搔痒。我配制一方，名为生血润肤饮。（用当归、地黄、生熟地黄、天冬麦冬、五味子、黄芩、瓜蒌仁、桃仁泥酒、红花、升麻，煎服十余帖，病如脱去一般痊愈。大便燥结，加火麻仁、郁李仁，后来治疗十几人都有效验。）
[Diagram of the Root and Markers of the Six Qi]
The "Root" (fundamental Qi) of the Six Qi corresponds as follows: Shaoyin corresponds to the Wu month, Taiyin to the Wei month, Shaoyang to the Yin month, Yangming to the You month, Taiyang to the Xu month, and Jueyin to the Hai month.
The verse states:
Zi month is Sovereign Fire, Chou month is Damp Earth, Mao month is Dry Metal as the Marker; Chen month is Cold Water, Si month is Wind Wood coordinating together.
Shen month's Ministerial Fire also originates from these numerical principles, while the remaining regular transformations follow their natural order.
Heaven is divided into Five Qi, and Earth is arranged into Five Elements. The Five Qi flow separately, scattering above, passing through the constellations, and merging below with the directional positions, thus being named the Five Movements (Wu Yun).
Dan Tian Qi (Red Qi) passes over the four constellations of Niu, Nu, Kui, and Bi, descending upon the positions of Wu and Gui, establishing the Fire Movement.
Cang Tian Qi (Green/Blue Qi) passes over the four constellations of Xin, Wei, Jiao, and Zhen, descending upon the positions of Jia and Ji, establishing the Earth Movement.
Su Tian Qi (White Qi) passes over the four constellations of Kang, Di, Mao, and Bi, descending upon the positions of Yi and Geng, establishing the Metal Movement.
Xuan Tian Qi (Black Qi) passes over the four constellations of Zhang, Yi, Lou, and Wei, descending upon the positions of Ren and Xin, establishing the Water Movement.
Cang Tian Qi (Green Qi, referring to Wood) passes over the four constellations of Wei, Shi, Liu, and Gui, descending upon the positions of Ding and Ren, establishing the Wood Movement.
These Five Qi pass through the Twenty-Eight Mansions, corresponding clearly with the Twelve Branch positions, making it evident that these are used to record heavenly times and establish the Five Movements. Wu is the Gate of Heaven, belonging to the Qian position. Ji is the Door of Earth, belonging to the Xun position. From Fang to Bi, fourteen mansions are Yang, governing the day; from Mao to Xin, fourteen mansions are Yin, governing the night, together representing one day.
If deduced by the method of Month Establishment, the cause for establishing the Movements becomes visible. Generally, Nei Zhe (Bing) is the Yang of Fire, established at the beginning of Jia and Ji years, with the first month establishing Bing Yin. Bing Fire generates Earth, so Jia and Ji years are Earth Movements. Wu is the Yang of Earth, established at the beginning of Yi and Geng years, with the first month establishing Wu Yin. Wu Earth generates Metal, so Yi and Geng years are Metal Movements. Geng is the Yang of Metal, established at the beginning of Bing and Xin years, with the first month establishing Geng Yin. Geng Metal generates Water, so Bing and Xin years are Water Movements. Jia is the Yang of Wood, established at the beginning of Wu and Gui years, with the first month establishing Jia Yin. Jia Wood generates Fire, so Wu and Gui years are Fire Movements. Ren is the Yang of Water, established at the beginning of Ding and Ren years, with the first month establishing Ren Yin. Ren Water generates Wood, so Ding and Ren years are Wood Movements. These Five Movements all originate from the Heavenly Stem established in the first month. Is this not the mutual interdependence and regulation of days, months, years, and seasons?
Another theory holds that since creation, the Five Qi have succeeded each other through Yuan Hui, and worldly movements have their own destiny, which heaven, earth, and all things cannot escape. In recent times, the Earth Movement has been dominant, hence people have phlegm even without disease, which differs from the previous dynasty (when Fire Movement was dominant) where heat syndromes were common. For instance, the so-called Yangmei Chu (Yaws/Kapok Sore) spread from south to north, affecting humans and animals similarly. Earth dampness generates mold (Mei), so it should be called Meichuang (Mold Sore). One must understand the Five Movements and Six Qi when reading medical texts. The Northern and Southern Policies do not apply only to a single year or time, nor should one forget the overarching system of worldly eras and movements!
A person traveling in the North suffered from epidemic cough and headache due to prolonged rain in summer and autumn. I administered Yiyuan San (Hua Shi [Talcum], 6 liang; Gan Cao [Licorice], 1 liang) mixed with ginger and scallion decoction, achieving immediate effect, expelling dozens of jin of phlegm daily. This was likely due to the Damp command of the Jia-Ji Earth Movement, where phlegm obstructed the Lung Qi in the upper orifices; treating by draining the Lower Orifice of the Bladder sufficed, and it did not fall under ordinary cough treatment.
In a Wu year, a spring plague occurred in Chu land, causing widespread mourning. I dispersed Wuwensan (Five Plagues Powder) into spring water and led children to distribute it, curing hundreds daily. In Wuwensan, Huang Qin [Scutellariae Radix] is the Sovereign herb in Yi-Geng years, Shan Zhi [Gardeniae Fructus] in Ding-Ren years, Huang Bo [Phellodendri Cortex] in Bing-Xin years, Huang Lian [Coptidis Rhizoma] in Wu-Gui years, and Gan Cao Shao [Licorice Root Tip] in Jia-Ji years. The Sovereign herb is doubled in dosage. Xu's Four Ingredients combined with Xiang Fu [Cyperi Rhizoma] and Zi Su [Perillae Folium] serve as Ministers, halved in dosage. The seven herbs are raw, powdered, mixed with three times the amount of Da Huang [Rhei Radix et Rhizoma], decocted thickly, strained, and boiled into a paste to form pills the size of chicken eggs. Coated with equal parts Zhu Sha [Cinnabar] and Xiong Huang [Realgar], and gold foil. Each pill is soaked in seven bowls of spring water, sufficient for seven people. (Verse: Five Plagues Formula takes the Movement as Sovereign; Kidney uses Bo, Heart uses Lian, Lung uses Qin, Spleen uses Cao, Liver uses Zhi to form the Five Movements; Zi Su and Xiang Fu combine as Ministers. Da Huang tripled, boiled into paste, formed into egg-sized pills for seven people. Coat with Xiong Huang and Zhu Sha powder, add gold foil for greater efficacy.)
Zhu Danxi said: For pediatric smallpox/chickenpox syndromes, Chen Wenzhong used warm-hot medicines like Muxiang San and Yigong San. This was largely because when the formula was created, the movement featured Cold Water ruling the Sky and Spring, and the season was severe winter cold. The cold qi constrained the eruption, preventing the sores from reddening and hardening, hence辛热 (acrid-hot) agents were used to disperse it. Today's practitioners treat indiscriminately regardless of seasonal cold or heat, which is erroneous.
A forty-five-year-old man, chronically thin and blood-deficient, experienced a Geng-Zi year with excessive Metal. In late autumn, when Dry Metal was active, following prolonged dry weather, he developed a Dry Syndrome: skin cracking, dry hands and feet, scaling upon scratching, bleeding with pain, thickened fingernails, and inability to scratch due to numbness. I formulated a prescription named Shengxue Runfu Yin (Blood-Generating Skin-Moistening Decoction). It contains Dang Gui [Angelicae Sinensis Radix], Di Huang [Rehmanniae Radix], Sheng Di Huang [Rehmanniae Radix Preparata], Shu Di Huang [Rehmanniae Radix Preparata], Tian Dong [Asparagi Radix], Mai Dong [Ophiopogonis Radix], Wu Wei Zi [Schisandrae Fructus], Pian Huang Qin [Scutellariae Radix], Gua Lou Ren [Trichosanthis Semen], Tao Ren [Persicae Semen] with wine, Hong Hua [Carthami Flos], and Sheng Ma [Cimicifugae Rhizoma]. After taking more than ten doses, the illness vanished like shedding a shell. For dry stool, add Ma Ren [Semen Cannabis] and Yu Li Ren [Pruni Semen]. Subsequent treatments on over ten patients proved effective.