Di Tian Sui (Drops of Heavenly Marrow)

In one line: The crowning achievement of the 理气派 — using the Way of Heaven to illuminate destiny, every sentence distilled to its essence.

Background

Di Tian Sui is traditionally attributed to Liu Bowen (刘伯温), the Ming dynasty strategist Liu Ji, though scholars have long debated the true authorship. It was the Qing-dynasty scholar Ren Tieqiao (任铁樵) who, in annotating the text and weaving his own case studies throughout the commentary, turned it into the founding work of the 理气派.

From Ren's preface: "The method of Zi Ping rests entirely on the Five Elements of the Four Pillars. Observe their strength and weakness, trace their harmony and conflict, weigh their advance and retreat, discern what they favor and what they shun — this is what it means to grasp the underlying principle. As for exotic patterns, bizarre configurations, Shen Sha, NaYin, and the like — these are the inventions of busybodies, irrelevant to fortune or misfortune."

This one passage sets the tone for everything that follows: return to the essence of the Five Elements; discard exotic patterns and Shen Sha.

Book Structure (Six Chapters on 通神论 + Two on the Branches)

Di Tian Sui Chan Wei opens with the 通神论 (Treatise on Communing with the Spirit), structured around the three powers of Heaven, Earth, and Man, with the Heavenly Stems and Earthly Branches as its crosscutting threads — eight chapters in all:

7 Core Ideas (Ren Tieqiao's Practical System)

1. 理气 as One (The View from Heaven)

The way of BaZi is rooted in the principles of Heaven and Earth

Ren elevates BaZi to philosophy — not rote formula-matching, but a deep feel for how the cosmos moves. In his words: "The Stems are the element of Heaven, the Branches are the element of Earth, and the hidden stems within the Branches are the element of Man. Human destiny, for all its staggering variety, never escapes the logic of these three — this is the wellspring of every method."

2. Strength Comes First (The Day Master View)

When you read a chart, your first task is to gauge Day Master strength:

• Gaining season (the month branch nourishes it) + gaining ground (deep root qi) + gaining support (fellow Stems lend aid) = strong
• The reverse = weak
• If strong, restrain it; if weak, support it — this is the first rule for choosing the favorable element

3. The Favorable Element Reigns (The Method View)

As the old saying goes: master the favorable element, and the whole chart opens up before you

Di Tian Sui places the favorable element at the very heart of BaZi practice. Together with the Pattern method of Zi Ping Zhen Quan (True Commentary on Ziping), it forms one of the twin pillars of classical BaZi. But where Zi Ping Zhen Quan works through eight standard Patterns, Di Tian Sui dispenses with them entirely and focuses on "Day Master strength + the favorable and unfavorable elements" — and that is precisely where the 理气派 and the Pattern school part ways.

4. Climate Adjustment Takes Priority (The Climate View)

Ren wrote: "When the season grants support, look to bolstering and restraining; when it does not, look first to climate adjustment."

Climate adjustment is BaZi's first order of business — it outranks even support and restraint:

• Born in winter → cold; favor Fire to warm (Bing Fire is the primary climate-adjustment favorable element)
• Born in summer → heat; favor Water to cool (Ren and Gui Water are the primary climate-adjustment favorable elements)
• Born in spring or autumn → look to overall Five Elements balance; climate is secondary

5. Flow and Feeling (The Atmosphere View)

A chart is finest when its Four Pillars circulate and its Five Elements generate one another in sequence; it is most to be dreaded when the pillars are riddled with gaps and the elements are lopsided.

Flow and feeling (流通有情) — these four characters are Ren Tieqiao's master key for judging a chart's quality:

• The Five Elements generating one another with natural feeling (Water feeds Wood, Wood feeds Fire) → wealth and standing are within reach
• The Five Elements at war (Metal chops Wood, Water drowns Fire, with no mediating element between them) → hardship and struggle

6. The Turning Point of Yielding and Pressing (The Major Luck Cycle View)

Ren wrote: "Those who do not understand destiny are as good as deaf; those who grasp when to yield and when to press may yet open the ears of the world."

The interplay among the Major Luck Cycles, Annual Luck, and the natal chart is a contest between yielding and pressing:

• Yielding: the Major Luck Cycle nourishes what the chart needs → an auspicious period
• Pressing: the Major Luck Cycle restrains what the chart needs → a difficult period
• The crux: does the favorable element find strength in this cycle?

7. What to Keep and What to Discard (The Practitioner's View)

Ren Tieqiao returned again and again to this theme:

"Exotic patterns and bizarre configurations, Shen Sha and NaYin — these are the inventions of busybodies, irrelevant to fortune or misfortune."

In practice you must have the courage to let things go — set aside the dazzling but hollow apparatus of Shen Sha and focus on the three things that actually matter: the Day Master, the favorable element, and what the chart favors and shuns.

5 Classic Case Studies (from Ren Tieqiao's Practice)

Case 1: Splitting Jia to Ignite Ding — Jia Shen / Bing Yin / Jia Chen / Jia Zi

A Jia Day Master born in the Yin month: Wood holds the season, so the chart looks strong at first glance. Yet Jia sits on Chen Earth, with Shen Metal lurking in the residual qi — hidden drains and controls are already at work.

Ren's verdict: "The favorable element must lie in Wu Fire; Wei provides Fire's root, and real power comes when the luck cycles turn southward." The technique of splitting Jia to ignite Ding means that, however abundant the Jia Wood, it takes Bing Fire to release its brilliance and make something great of it.

Lesson: A strong Day Master does not always need to be controlled or drained — the Food God and Hurting Officer releasing elegance can be the finest path.

Case 2: Cold Metal, Frozen Water — Ren Chen / Ren Zi / Jia Wu / Yi Chou

A Ren Water Day Master born in the Zi month: the waters are vast, Jia and Yi Wood drift on the surface, and the lone Wu Fire sits cut off from any root.

Ren's verdict: "Born in the eleventh month, in the depths of winter — the water is ice-cold, the Metal is frozen. The favorable element must be Bing Fire." In his early years the man ran through northern Water luck and achieved nothing; in middle age his cycles turned southward into Fire territory, drawing out the Ding Fire hidden within Wu. He abandoned the Seal and turned to Wealth — and made a fortune of tens of thousands, took a concubine, and fathered four sons in succession.

Lesson: Climate adjustment (Bing Fire) matters more in winter than bolstering and restraining (Seal and Friend) — a principle that Qiong Tong Bao Jian (Precious Mirror for Examining the Profound) and Di Tian Sui both treat as the first law of BaZi.

Case 3: Hurting Officer Meets the Seal — Geng Shen / Wu Yin / Xin Mao / Wu Zi

A Xin Metal Day Master born in the Yin month: Wood is in season and Metal is imprisoned — a Hurting Officer confronting the Direct Officer.

Ren's verdict: "When a Hurting Officer uses the Seal, the favorable element is the Direct Officer itself — contrary to the common claim that an Earth-Metal Hurting Officer must shun the Direct Officer." A Mao-You clash would leave the Seal without support; a Zi-Wu clash would let the Hurting Officer run wild. With Earth Seals piled so high that Metal is buried and the Ren Water that serves as the favorable element is utterly destroyed, this chart achieves great wealth and status precisely through the Hurting Officer confronting the Direct Officer — the key is that the Seal restrains the Hurting Officer.

Lesson: A Hurting Officer meeting the Direct Officer is not necessarily inauspicious — there are many ways to resolve it: a Seal controlling the Hurting Officer, or the Hurting Officer generating Wealth, and so on.

Case 4: Food God Tames the Killings — Wu Chen / Jia Yin / Gui Mao / Bing Chen

A Gui Water Day Master born in the Yin month: Wood holds the season and the Seven Killings show in the Stems, while the Food God (Bing Fire) in the hour pillar keeps the Killings in check.

Ren's verdict: "The Seven Killings hold the season, and the Food God tames them — the Pattern is pure and clean." When the luck cycles turned southward into Fire territory, the Food God gained strength and the Seven Killings were held in check — a chart destined for military distinction.

Lesson: In a Food God Tames the Killings Pattern, everything hinges on the balance of power between the Food God and the Seven Killings — if the Food God grows too strong, the Killings are extinguished; if the Killings overpower, the Food God is wounded.

Case 5: Abandoning the Day Master to Follow Wealth — Ji Si / Ji Si / Ren Zi / Geng Zi

A Ren Water Day Master born in the Si month: Fire holds the season, Water is besieged by Fire and Earth, and the Day Master is pushed to the brink.

Ren's verdict: "Ren Water has no root; Metal is overcome by Fire. Abandon the Day Master and follow Wealth." The key to this Abandoning-the-Day-Master-to-Follow-Wealth Pattern: the Day Master must be genuinely rootless, and the Wealth stars must dominate the chart in force. Northern Water luck is disastrous; western Metal luck, which would nourish and support the Day Master, is equally disastrous — only southern Fire and Earth luck is favorable.

Lesson: A Follower Pattern must not be disrupted — if a Major Luck Cycle ever bolsters the Day Master back to life, the Pattern shatters, and catastrophe follows.

12 Practical Maxims from Ren Tieqiao

The core principles Ren Tieqiao returns to again and again in his annotations:

1. Gauge the Day Master's strength; discern what the favorable element favors and shuns (the master key)
2. When the season grants support, look to bolstering and restraining; when it does not, look first to climate (climate above all)
3. A chart that circulates is beautiful; one that is lopsided is sick (the atmosphere principle)
4. Exotic patterns cannot be trusted; Shen Sha and NaYin are mostly invention (discard the false, keep the true)
5. The favorable element must be strong, and the luck cycle must arrive at the right place — only then do wealth and status follow (putting the favorable element to work)
6. A Pattern's success or failure depends on whether rescue arrives (flexibility within the Pattern)
7. The assisting element, properly paired, helps the favorable element achieve greatness (the supporting-element principle)
8. Whether a Major Luck Cycle yields or presses, the favorable element calls the shots (luck serves the chart)
9. A strong Day Master favors Wealth; a weak Day Master favors the Seal (the support-and-restraint rule)
10. Cold calls for warmth; heat calls for cool; dryness calls for moisture; dampness calls for dryness (the four climate methods)
11. A mediating element, working with feeling, dissolves hostility (the mediation principle)
12. Keep, discard, and arrange — and judge each with precision (the practitioner's art)

Relationship to the Other Classics

Suggested Learning Path

Beginner (0–3 months)

• Read the Pattern method in Zi Ping Zhen Quan (Shen Xiaozhan) — master the eight standard Patterns
• Read the first six chapters of this book (通神论) — build your 理气 intuition

Intermediate (3–12 months)

• Study Ren Tieqiao's case analyses closely — learn how a practitioner actually reasons
• Cross-reference Qiong Tong Bao Jian (Precious Mirror for Examining the Profound) — master climate-adjustment favorable elements

Advanced (1 year and beyond)

• Read the three great schools in dialogue with one another (this book + Zi Ping Zhen Quan + San Ming Tong Hui)
• Test your reading against real charts and build your own framework of judgment

Study Tips

• ✅ Best for: Students who already have a BaZi foundation and are ready to go deeper
• ⚠️ Difficulty: ★★★★★ (Ren Tieqiao's annotations are essential)
• 📖 Recommended edition: Ren Tieqiao, Di Tian Sui Chan Wei (our digital edition is included)
• 🎯 Suggested path: Start with Zi Ping Zhen Quan to learn favorable-element selection, then turn to Di Tian Sui to grasp the Way of Heaven

🔗 Related reading: Zi Ping Zhen Quan (Pattern method) · Qiong Tong Bao Jian (climate method) · San Ming Tong Hui (case library)