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I Ching Birth Hexagram · Hexagram 55 of 64

Hexagram 55, 豐 Fēng: thunder and lightning at full strength

豐 Fēng is hexagram 55 of the Zhouyi, which sets thunder over fire: lightning and thunder, clarity and movement at full strength. The character means abundance or fullness, and the Judgment places a king at that peak and tells him to be like the sun at noon, which is at its height and so already turning.

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Hexagram 55, 豐 Fēng, drawn as six lines numbered from the bottom: whole, broken, whole, whole, broken, broken. The lower, inner trigram is 離 Lí, Fire; the upper, outer trigram is 震 Zhèn, Thunder. 1 2 3 4 5 6 Upper, outer 震 Zhèn, Thunder Lower, inner 離 Lí, Fire 55 豐 Fēng Lines numbered from the bottom
The figure of 豐 from the bottom line up: Fire inside, Thunder outside. Three broken lines, three whole.

Facts

Number
55 of 64, in the received order
Character and pinyin
豐 Fēng ䷶
Our title
Fullness
Lines, bottom to top
yang, yin, yang, yang, yin, yin
Lower trigram (inner)
☲ 離 Lí, Fire
Upper trigram (outer)
☳ 震 Zhèn, Thunder
Within (nuclear)
28 大過 Dà Guò, Great Excess
King Wen pair
56 旅 Lǚ, The Traveller
Legge's name (1882)
Făng
Part of the text
The second part (下經), 31 to 64

Meaning

Fire below, thunder above: the storm at its height, flash and roll together. 豐 means full, abundant, plenty, and the tradition reads the hexagram as the peak of a cycle. The Judgment speaks to a king who has reached that point: progress and development, no cause for anxiety; "let him be as the sun at noon", in Legge's English. The commentaries draw out the double edge: the sun at noon is at its height, and from that moment it declines.

The Image reads the storm as judgement that is both clear and exact. In our own reading, 豐 is fullness as a moment rather than a state, a time to give light while there is light. The line texts, strangely, grow darker as they rise.

The lines

The first line meets its counterpart, two of the same kind, and is approved. In the second and fourth places screens are hung so thick that at midday one can see the stars of the Dipper; in the third a heavier screen still hides the sun until only a faint star shows. The fifth gathers people of brilliant ability around it, and there is praise. The top line has a great house and screens round its family, and peering through the door sees no one for three years.

Its pair is 旅, hexagram 56, the same figure upside down; within 豐 lies 大過, hexagram 28, and every line flipped gives 渙, hexagram 59.

In the birth cast

The time cast arrives at 豐 when the year, month and day leave 4 on eight, which puts 震 thunder above, and the same total with the hour added leaves 3, which puts 離 fire below. Which line moves depends on what the whole total leaves on six, and each line turns the figure into a different hexagram:

  • Line 1 (初九) moving: becomes 62 小過 Xiǎo Guò, Small Excess
  • Line 2 (六二) moving: becomes 34 大壯 Dà Zhuàng, Great Power
  • Line 3 (九三) moving: becomes 51 震 Zhèn, Shock
  • Line 4 (九四) moving: becomes 36 明夷 Míng Yí, Brightness Wounded
  • Line 5 (六五) moving: becomes 49 革 Gé, Changing the Hide
  • Line 6 (上六) moving: becomes 30 離 Lí, Brightness

Lines 2 to 5 give the hexagram within, 28 大過 Dà Guò, Great Excess. Everyone born in the same lunar day and double hour has the same cast, so the figure describes a moment, not a person.

Correspondences

Each item with how it stands: “sourced” is in the work cited, “our construction” is EsoTerrier’s own, and “disputed” means the sources disagree.

Trigram virtues (Shuogua, chapter 7)
離 bright, attached below; 震 moving, startling above, in our English sourced
Trigram family places (Shuogua)
middle daughter below, eldest son above sourced
Trigram body and animal images (Shuogua)
eyes and pheasant below; feet and dragon above sourced
Trigram phases (a classical correspondence: the Plum Blossom text's table)
Fire below, Wood above. The Han assignment of 梅花易數, book 1, also used by Jing Fang; not stated as such in the Zhouyi sourced
Inverse and opposite
Upside down: 56 旅 Lǚ, The Traveller; every line flipped: 59 渙 Huàn, Scattering sourced
Human Design gate
Gate 55, from 330.125° to 335.75° of the tropical zodiac on Ra Uru Hu's wheel (1987): a modern placing, not the I Ching's sourced
Our English title
Fullness: EsoTerrier's own, from the sense of 豐 our construction

How the schools read it

The Zhouyi, in Legge's translation (1882)
“Let him be as the sun at noon.”
The Image (大象), one of the Wings, in our paraphrase
Thunder and lightning together; the superior man decides cases of litigation and apportions punishments exactly.
The Plum Blossom method (Ming)
A figure reached by numbers: 震 above when the year, month and day leave 4 on eight, 離 below when the same total with the hour leaves 3.
Human Design (Ra Uru Hu, 1987)
Takes the number for its gate 55 and puts it on the zodiac; its own reading, which we do not quote.
EsoTerrier
Thunder and lightning together: fullness at its height, like the sun at noon; not a time for sadness but for being like the noon sun, since what is full also begins to turn.

Claims about it

  • Gate 55 of Human Design, at 330.125° to 335.75° of the zodiac, is where the I Ching itself places hexagram 55.

    false

    What the record shows: The wheel is Shao Yong's circle rotated by Ra Uru Hu in 1987 to 1989 so that hexagram 41 starts at 2° Aquarius. No Chinese source we found puts the hexagrams on degrees of the zodiac.

  • Being born under 豐 Fēng fixes a person's character.

    unverified

    What the record shows: A modern reading with no source in the tradition. The Zhouyi has no birth hexagram; the cast reads a figure, not a person, and everyone born in the same lunar day and double hour shares it.

Elsewhere on EsoTerrier

Sources

Primary texts (6)
  1. James Legge (trans.), The Yî King, Sacred Books of the East XVI. Oxford: Clarendon Press, 1882. Public domain; quoted briefly and credited. en.wikisource.org/wiki/Sacred_Books_of_the_East/Volume_16
  2. 梅花易數 (Meihua yishu, the Plum Blossom method), attributed to Shao Yong, book 1: the time rule, the trigram numbers and phases, and the casts of the plum blossom and the peonies. zh.wikisource.org/wiki/梅花易數/卷一
  3. 周易 (Zhouyi), the received Chinese text of the hexagram and line statements with the Ten Wings. ctext.org/book-of-changes
  4. The same, the 1882 Oxford edition scanned (archive.org), for hexagrams 33 to 64 and the appendices. archive.org/details/sacredbooksofchi16conf
  5. The Unicode Standard, Yijing Hexagram Symbols, U+4DC0 to U+4DFF. unicode.org/charts/PDF/U4DC0.pdf
  6. 京氏易傳 (Jingshi yizhuan), attributed to Jing Fang, three books. zh.wikisource.org/wiki/京氏易傳
Studies and other sources (3)
  1. "King Wen sequence", Wikipedia. en.wikipedia.org/wiki/King_Wen_sequence
  2. Jovian Archive, "Gates and hexagrams in Human Design" (cited for the wheel's origin only). jovianarchive.com/pages/gates-and-hexagrams-in-human-design
  3. "Hexagram (I Ching)", Wikipedia. en.wikipedia.org/wiki/Hexagram_(I_Ching)
Our own research (5)
  1. EsoTerrier, I Ching research, 10 to 14 October 2026: the method, the validation (61 births), the variants and the lists.
  2. EsoTerrier calculation engine, the I Ching service and its reference tables (titles, glosses and readings our own).
  3. EsoTerrier, Gene Keys research, 9 October 2026: the legal and trade-mark report, on which hexagram names are free to use.
  4. EsoTerrier, Human Design research, 9 October 2026: the wheel, gate 41 at 2° Aquarius, 5.625° per gate.
  5. EsoTerrier, engine audit of 14 October 2026: the reworded titles, readings and trigram qualities, with the passages each rests on.

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By EsoTerrier. Written with AI assistance from our research and checked against its sources; last revised 19 October 2026. How we write these pages.

First published ; last revised . Corrections: support@esoterrier.com.