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#Spring Equinox #Twenty-Four Solar Terms #Traditional Culture #Pre-Qin Philosophy #Astronomical Calendar

Yin and Yang in Equal Measure: The Way of Central Harmony and the Equilibrium of Day and Night at the Spring Equinox

This article offers a multi-dimensional exploration of the Spring Equinox (Chunfen) among the Twenty-Four Solar Terms, drawing on pre-Qin Confucian and Daoist philosophy, the original meanings of Chinese characters, and astronomical phenomena. By analyzing the character 'fen' (divide/equalize), the sun's alignment with the equator, and seasonal signs such as the return of swallows and the onset of thunder, it reveals the profound wisdom of 'central harmony' and the unity of Heaven and humanity embedded in the equinox's equal days and nights.

Xuanji Editorial Board March 20, 2026 62 min read PDF Markdown
Yin and Yang in Equal Measure: The Way of Central Harmony and the Equilibrium of Day and Night at the Spring Equinox

Chapter Fourteen: The Spring Equinox in Literature -- The Dark Swallow and Spring Scenery in the Book of Songs and the Songs of Chu

I. "Heaven Commanded the Dark Swallow to Descend and Give Birth to Shang": The Solemn Chant of the Hymns of Shang

In Chinese literature, the text most profoundly and weightily connected to the Spring Equinox's "dark swallow arrives" is the Book of Songs, "Hymns of Shang," "Dark Swallow" (Xuanniao). This poem, in a tone of supreme solemnity, chants the founding myth of the Shang people:

"Heaven commanded the dark swallow / To descend and give birth to Shang, / Who dwelt on the vast lands of Yin. / The ancient thearch commanded Wutang / To set right the domain of the four quarters."

"Heaven commanded the dark swallow to descend and give birth to Shang" -- what a solemn opening! It ties the origin of the Shang people directly to "Heaven's command" and "the dark swallow." The dark swallow here is no ordinary bird but a sacred creature bearing Heaven's mandate, giving birth to a holy lineage. The birth of the Shang people is presented as a sacred event realized through the dark swallow by the will of Heaven.

II. "Swallows Fly About": The Deep Feeling of the Swallow in the Book of Songs

If the "Hymns of Shang" present the sacred, solemn aspect of the dark swallow, the Book of Songs, "Airs of Bei," "Swallows" (Yan yan) reveal its tender, deeply emotional side:

"The swallows fly about, with uneven feathers spread. That lady is going to her new home; I accompany her far across the open fields. Gazing after her until she can no longer be seen, my tears fall like rain."

This poem has long been honored as "the ancestor of all farewell poems in all ages." It opens with the image of swallows flying in pairs, then draws out the deep sorrow of parting. The swallow flying in pairs -- togetherness, companionship, constancy -- contrasts poignantly with the human separation; precisely because togetherness and union (like swallows flying in pairs) are so yearned for, parting is all the more heart-wrenching.

III. Spring Scenery and the Celebration of Life in the Songs of Chu

The southern Songs of Chu (Chuci), in their resplendent and romantic manner, depicted the vitality of spring and offered paeans to life.

Master Qu Yuan, in "Nine Songs: Lord of the East" (Dong jun), celebrated the sun god: "The brilliant one is about to emerge from the east, shining upon my railing at Fusang... / Clothed in robes of azure clouds and skirts of white rainbow, / He raises his long arrows to shoot the star Heavenly Wolf." This magnificent celebration of the rising sun in the east resonates with the rite of "greeting the sun in the eastern suburb" at the Spring Equinox. The "azure" of "azure cloud robes" is spring's true color, the directional color of the east, perfectly aligning with Wood virtue at the Spring Equinox.

IV. The Resonance of Heaven and Humanity Behind Literary Imagery

Why, from the Book of Songs to the Songs of Chu, were the ancients so devoted to using the dark swallow and spring scenery to express emotion and celebrate life$22 The answer lies in their profound "resonance between Heaven and humanity." The swallow's return awakens longing for life, for reunion, for reproduction; spring's flourishing stirs celebration of vitality, of hope, of life-force. In the flitting silhouette of a swallow, in the lush green of spring grass, the ancients saw not only external nature but a mirror of their own lives.


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