What Does “Nourishing Yin” Really Mean? Doctor Zhu Danxi’s “Nourishing Yin” Was Mostly Nourishing the Blood — A Summary of His Medical Thought, One of the Four Great Masters of the Jin-Yuan Era

Patient search terms: what does nourishing yin mean / nourishing yin vs nourishing blood / Doctor Zhu Danxi medical thought / Four Great Masters of the Jin-Yuan era / Zhu Danxi nourishing yin school / what is pattern differentiation and treatment / history of Chinese medicine classics / the Imperial Grace Formulary / Si Wu Tang / Yue Ju Wan / Bu Zhong Yi Qi Tang / Er Chen Tang / Cheng-Zhu neo-Confucianism and medicine / why is Zhu Danxi called a great master / Doctor Luo Dalun Zhu Danxi series

Corresponding medical names: nourishing yin (zi yin) · nourishing the blood (yang xue) · yin blood (yin xue) · body fluids (jin ye) · pattern differentiation and treatment (bian zheng lun zhi) · the Four Great Masters of the Jin-Yuan era (jin yuan si da jia) · the Earth-Tonifying school (bu tu pai) · the “Nourishing Yin school” (zi yin xue pai) · the four injuries doctrine (si shang xue shuo) · upright qi (zheng qi) · qi deficiency (qi xu) · blood deficiency (xue xu) · phlegm (tan) · stagnation (yu)

Opening: The Zhu Danxi series is finished — Doctor Luo Dalun takes stock

After so many lectures on Doctor Zhu Danxi’s clinical cases, Doctor Luo Dalun says: today we pause and make a full summary of Zhu Danxi’s academic thought from beginning to end — what exactly made him great, and what can we learn from him?

💬 Note from Doctor Luo: Of course, we have not yet told all of Doctor Zhu Danxi’s cases — the Gu Jin Yi An An (An Examination of Medical Cases Ancient and Modern) and other books still record many vivid cases of his, and we can add them slowly when there is a chance. But first let us get his academic thought straight, so that when you look back at those cases, you understand why he used medicine the way he did. To explain Zhu Danxi properly, we first have to explain how Chinese medicine itself traveled down through history.

How hard it was for the classics of Chinese medicine to survive

Doctor Luo says that Chinese medicine grew through a historical process. The earliest foundational works were many, and the most important of them was the Huang Di Nei Jing (the Yellow Emperor’s Inner Classic) — but unfortunately many of the others were gradually lost. The later clinical foundation was Doctor Zhang Zhongjing’s Shang Han Za Bing Lun (Treatise on Cold Damage and Miscellaneous Diseases) — yet even these books were lost in transmission over the centuries; people simply could not find them.

💬 Note from Doctor Luo: So there was already debate in ancient times over which parts of the Huang Di Nei Jing were added later and which were original. Sun Simiao (the Tang-dynasty King of Medicine) recorded that he had seen physicians who secretly kept a copy of the Shang Han Lun but refused to pass it on — they kept it for themselves and told no one. It was not until the Song dynasty that someone discovered the book in the imperial library and had it printed — this is the famous Song-dynasty printed edition (Song ke ben). You see — for a classic to survive the long centuries and reach our hands is no small thing.

The formulary period: a house full of secret prescriptions, but no one knew who they were for

With the classics out of reach, Chinese medicine went through what can be called the “formulary period” — everyone was busy collecting secret formulas and proven prescriptions, believing that as long as you picked the right formula, you could cure the disease.

💬 Note from Doctor Luo: This was most popular in the Tang and Song dynasties. Sun Simiao’s Qian Jin Fang (Essential Prescriptions Worth a Thousand Gold) gathered a great many formulas; in the Song dynasty, the imperial court printed the Tai Ping Hui Min He Ji Ju Fang (the Formulary of the Imperial Grace Pharmacy) — the emperor of the day took the initiative to collect proven formulas from all over the realm, verify them, and publish them for ordinary people to use by comparison; anyone who submitted a formula that proved effective was rewarded. The famous Si Wu Tang (Four Substances Decoction), Si Jun Zi Tang (Four Gentlemen Decoction) and Huo Xiang Zheng Qi San (Agastache Qi-Correcting Powder) that everyone knows today all come from this book.

But the more formularies accumulated, the more a problem grew:

💬 Note from Doctor Luo: These books said little about pattern differentiation and treatment (bian zheng lun zhi) — under what circumstances, how to distinguish qi and blood, which formula fits which pattern. Take headache: it lists twenty-odd formulas for you — headache formula number one, headache number two, headache number three… You actually get a headache, you open the book, and you still cannot tell which pattern you have; you can only try them one by one and gamble. So in that period, Chinese medicine was mainly stockpiling formulas; theoretical development was slow.

The Four Great Masters of the Jin-Yuan era: the turning point from “stockpiling formulas” to “differentiating patterns”

The reign of the formularies was completely overturned in the Jin-Yuan period — the Four Great Masters of the Jin-Yuan era appeared.

💬 Note from Doctor Luo: The hallmark of the Four Great Masters was that they began to stress pattern differentiation and treatment — explaining how diseases arise, from which aspect to treat them in each situation, and how to regulate qi and blood. Each of them studied the Huang Di Nei Jing, found one point in it that seemed especially important, developed it, and pushed it to its peak — that is what a “school” is. A school is simply the field that a particular physician excelled in. Doctor Li Dongyuan, for example, founded the Earth-Tonifying school (bu tu pai) — he was especially good at building up the spleen and stomach: for ordinary internal-organ diseases, he could strengthen the source of your body’s production so that your qi and blood were supplied again and the body slowly recovered.

What was so remarkable about the Four Great Masters?

💬 Note from Doctor Luo: They opened the way for the development and elaboration of Chinese medical theory. From then on schools multiplied, physicians’ interpretations of the classics grew ever richer, theory and practice of pattern differentiation kept advancing, and famous doctors appeared one after another. After the Jin-Yuan era, in the Ming dynasty, Chinese medicine climbed to a peak; the Ming and Qing dynasties were a period of great development — and through all of it, the Four Great Masters deserve the credit. Today some people who have not really studied the classics sneer and say: the Four Great Masters each clung to their own opinion; if you want to learn Chinese medicine you should just learn the Huang Di Nei Jing — they all went off track. I say that is wrong — those masters were all developing the Huang Di Nei Jing. No discipline can be fully expressed by a single classic; it is precisely because you have not studied deeply enough that you think everyone else is wrong.

Who was Doctor Zhu Danxi? — A genuine heir of Zhu Xi who took up medicine midway through life

Among the Four Great Masters, Doctor Zhu Danxi was a highly distinctive figure.

💬 Note from Doctor Luo: He was originally an heir of Zhu Xi, trained in Cheng-Zhu neo-Confucianism, and his place in the Confucian lineage is clearly recorded — he was an orthodox successor. It was only because someone in his family fell ill that he took up medicine. After he did, he brought some of the neo-Confucian ideas into Chinese medicine — for example the view of motion and stillness (dong jing) and the control of human desires — and these enriched the content of medical theory. Chinese medicine attaches great importance to self-cultivation, and caring for the body needs theoretical support; Zhu Danxi wrote beautifully and had a deep theoretical foundation, so he produced a series of essays on health and on how to nurture oneself.

He asked about lifestyle before treating: the pioneer of systematic case records

When Doctor Zhu Danxi saw a patient, he paid special attention to how emotions and habits affected the person.

💬 Note from Doctor Luo: Look at the cases he wrote — he usually begins by setting down exactly who the person was: loves wine, loves women, quick-tempered, easily angered — written out plainly. Why? Because these things are connected to his illness; writing them down lays the foundation for the analysis that follows. Today we take it for granted that lifestyle, temperament and physical health belong together, but in clinical work, the person who really began systematic recording and systematic analysis was Doctor Zhu Danxi. This way of analyzing a problem is worth learning.

What does “nourishing yin” mean? — What he called “nourishing yin” was mostly nourishing the blood

Later generations all called Doctor Zhu Danxi the founder of the “Nourishing Yin school.” Doctor Luo says: here you must understand something — the “nourishing yin” he talked about is not the same thing as what we call nourishing yin today.

💬 Note from Doctor Luo: Today, when we say nourishing yin, we mean insufficient body fluids (jin ye) — you use sheng di (raw rehmannia), sha shen (ladybell root), mai dong (ophiopogon), shi hu (dendrobium), and shao yao with gan cao (peony with licorice) — cooling the blood and nourishing fluids. Nourishing the blood, by contrast, uses dang gui (angelica), long yan rou (longan flesh) and suan zao ren (sour jujube seed) — the two are separate for us. But in ancient times, yin and blood were spoken of together — “yin blood, yin blood”; blood is a part of yin. So when Zhu Danxi said “nourish yin,” it mostly meant nourishing the blood — when he talked about nourishing yin he reached for Si Wu Tang, which to our eyes is simply supplementing blood. Later people called him the “Nourishing Yin school” and said he specialized in “nourishing yin and draining fire” — let me say this without any politeness: people who talk that way have never read Zhu Danxi’s books. Read them once and you would never describe him that way.

The four injuries doctrine: tonify qi, nourish blood, transform phlegm, resolve stagnation

So what was Doctor Zhu Danxi really good at? Doctor Luo says: his four injuries doctrine (si shang xue shuo).

💬 Note from Doctor Luo: First, tonifying qi — he used Si Jun Zi Tang, and he was especially fond of Doctor Li Dongyuan’s Bu Zhong Yi Qi Tang (Tonify the Middle and Augment Qi Decoction), adapting it freely; this was the experience of Li Dongyuan, another of the Four Great Masters. Second, nourishing the blood — Si Wu Tang. Third, transforming phlegm — Er Chen Tang (the Two-Aged Decoction); Zhu Danxi had a great many methods for transforming phlegm. Fourth, resolving stagnation — he created Yue Ju Wan (Stagnation-Resolving Pill) and wrote many methods for resolving stagnation. So he was especially good at treating the body’s “deficiencies” and “blockages”: when qi and blood are deficient there is trouble, and when they are blocked there is also trouble. Within stagnation there is also fire-stagnation, and only then would he add a little zhi mu, huang bai or huang lian to drain fire — but that is just one situation among many within stagnation.

💬 Note from Doctor Luo: How much ren shen (ginseng) and bai zhu (atractylodes) did Zhu Danxi use? How much did he use to nourish blood? He was not someone who drained fire at the drop of a hat — he only drained when there really was stagnation and fire. And when he met a patient with yang deficiency, he used fu zi (aconite) and gan jiang (dried ginger) just the same, and used them liberally. He knew exactly which pattern he was facing and how to regulate the person. The later talk about him is often one-sided; we should give him a fair assessment.

His treatment style: when upright qi is badly depleted, support it first, then expel the pathogen slowly

Doctor Zhu Danxi’s treatment style was very clear — he prized supporting upright qi (fu zheng).

💬 Note from Doctor Luo: He valued the body’s upright qi enormously. Sometimes the pathogen looked fierce, but the root cause was severe deficiency of upright qi; in that case he would put off expelling the pathogen — or slow it down — and support upright qi first, then gradually expel the pathogen on that foundation. In his use of medicine he was extremely flexible — how to decoct the soup, how to use pills, how to take the powder with a liquid, which to use first and which later — the care he took is astonishing. The ancients truly had a gift for medicine: Zhu Danxi studied on his own, then met his teacher Doctor Luo Zhiti, who taught him for only a year and a half — and he became a master.

His most remarkable achievement: education in the philosophy of life

At this point Doctor Luo says: the thing I admire most about Zhu Danxi is that he attached extraordinary importance to people’s psychology and values.

💬 Note from Doctor Luo: The connection between a person’s psychological state, harmful emotions and illness — I have said this all along. Who inspired me? Doctor Zhu Danxi. When I was a student and read his books, I was deeply moved: he had already linked bad emotions and psychological states with illness. But Zhu Danxi went one level higher — education in the philosophy of life. He traveled from place to place, and wherever he saw harmonious families and sound ethics and morals, he recorded them and told the stories to everyone, so that wherever he went, the local customs changed for the better. When the philosophy of life changes, the emotions improve; with the emotions improved and then sorted out, he would prescribe medicine to regulate the body — worldview education, psychological adjustment, and prescription — even in today’s medical system this is the most advanced and most complete form of comprehensive medicine. Zhu Danxi accomplished this whole system with his own strength — that is why he is honored as one of the great masters of medicine: what he did, and the social standing he earned, are genuinely extraordinary.

After his death: a full school of disciples, and his doctrine carried to Japan

After Doctor Zhu Danxi died, many of his disciples became famous — Doctor Dai Sigong, Doctor Yu Tuan, and others, who held important positions in the world of Chinese medicine; some disciples even entered the Imperial Academy of Medicine and became imperial physicians (that was already in the Ming dynasty). Each disciple carried on the teaching in his own way, and all contributed to spreading the Danxi doctrine.

💬 Note from Doctor Luo: Zhu Danxi’s doctrine also reached Japan and had great influence overseas — some Japanese physicians studied his academic thought specially. If Chinese medicine is a great building, then Zhu Danxi, Li Dongyuan and the others are the important foundation stones — later generations could only build upward because the foundation was there. They carried on the past and opened the way for the future; they unlocked a great door for those who came after.

Epilogue: if you study Chinese medicine, take out Zhu Danxi’s books and read them

Finally Doctor Luo says: friends who want to learn Chinese medicine — when you have the chance, take out Doctor Zhu Danxi’s books and read them slowly. It will do you good.

💬 Note from Doctor Luo: The cases I have told are analyzed from my own angle. Zhu Danxi’s prescriptions were made with profound intentions, and I may not have explained them all fully — consider this a brick thrown to draw jade, an inspiration for you. Especially for students in Chinese medical colleges: read Zhu Danxi’s original works when you are interested. For instance, when you meet a patient with numbness of the limbs, Zhu Danxi said: numbness may come from qi deficiency, from blood deficiency, or from blockage — how to treat each and how to add or subtract — there are established methods to follow, and then you know exactly what to do.

The Zhu Danxi series ends here for now. Doctor Luo says that in a couple of days he will finish telling Ji Xiaolan’s Yuewei Caotang Biji (Notes from the Thatched Cottage of Close Observation) (he is already more than halfway through), and then continue with other ancient physicians, taking everyone along to study the clinical experience of the great doctors of old.

Compiled from Doctor Luo Dalun’s lecture series on Doctor Zhu Danxi.

What to take away

• The classics barely survived: the Huang Di Nei Jing and the Shang Han Za Bing Lun were lost and rediscovered over centuries; the Song-dynasty printed edition of the Shang Han Lun only appeared because someone found the manuscript in the imperial library.
• The formulary period stored prescriptions but not judgment: the Imperial Grace Formulary gave us Si Wu Tang, Si Jun Zi Tang and Huo Xiang Zheng Qi San, yet without pattern differentiation a headache still left you facing twenty-odd formulas and guessing.
• The Four Great Masters of the Jin-Yuan era changed the game: they turned Chinese medicine from stockpiling formulas to pattern differentiation and treatment, each developing one insight of the Inner Classic into a school — and the Ming-Qing peak of Chinese medicine rests on their work.
• Doctor Zhu Danxi’s “nourishing yin” was mostly nourishing the blood: in ancient usage yin and blood were spoken of together; when he said nourish yin he reached for Si Wu Tang. Calling him the “nourishing yin and draining fire” specialist simply means you have not read his books.
• His real system was the four injuries doctrine: tonify qi (Si Jun Zi Tang, Bu Zhong Yi Qi Tang), nourish blood (Si Wu Tang), transform phlegm (Er Chen Tang), resolve stagnation (Yue Ju Wan) — treating the body’s deficiencies and blockages, with fire-draining only when stagnation and fire were truly present.
• He treated the person, not just the pattern: he prized supporting upright qi, would hold off attacking the pathogen when the root was severe deficiency, recorded each patient’s lifestyle systematically, and combined worldview education, psychological adjustment and prescription into one complete system — that is why he stands among the great masters.