Chapter 8 The Phenological World of Yushui: The Three Signs Explained One by One

1. The Significance of Phenology: A Microscopic Signal of the Way of Heaven in Motion

Before delving into the three phenological signs of Yushui, we must first understand the fundamental significance of phenology within pre-Qin solar-term culture. The "Explanation of Seasonal Instruction" chapter of the Lost Books of Zhou (Yi Zhoushu) assigns three phenological signs to each of the Twenty-Four Solar Terms, forming a complete phenological system. The three signs of Yushui are: first, the otter lays out fish; second, the wild geese head north; third, plants and trees begin to sprout.

Why did the ancients attach such importance to these subtle phenological signs$19 Because, in their cosmology, Heaven, Earth, and the ten thousand things formed one organic whole, and any local change reflected the movement of the whole. When the otter offers fish in sacrifice, when the wild geese return north, when plants and trees begin to sprout—none of this is "decided" by these creatures themselves, but is the inevitable result of the qi of Heaven and Earth having progressed to a particular stage. By observing these phenological phenomena, the ancients grasped the rhythm of the qi of Heaven and Earth in motion, thereby verifying the solar terms and arranging agricultural work accordingly.

More importantly, the three signs of Yushui possess an inner logical structure: they are drawn respectively from the animal realm (the otter, the wild goose) and the plant realm (plants and trees), and together span three domains—water (fish), sky (geese), and earth (plants and trees). The ancients used these changes across three different domains and levels to cross-verify the arrival of Yushui—the fish in the water become active (the otter lays out fish), the geese in the sky return (the wild geese head north), the plants and trees on the earth begin to sprout (plants and trees begin to sprout). Only when all three signs were confirmed together could Yushui's arrival be truly known. This embodies the ancients' plain yet rigorous empirical spirit, and also their holistic cosmology in which "Heaven, Earth, and the ten thousand things run through as one."

2. The First Sign, "The Otter Lays Out Fish": The "Sacrifice" of Animals and the Germination of Ritual Propriety

The first sign of Yushui is "the otter lays out fish." The "Explanation of Seasonal Instruction" states: "On the day of Yushui, the otter offers fish in sacrifice"—on the day Yushui arrives, the otter begins catching fish and laying them out. We have already, in Chapter Five, expounded on this from the Confucian perspective of "repaying the root and returning to the origin"; here let us delve further, from the angle of phenological logic and cultural archetype.

Let us first consider the phenological logic. Why does the otter's laying out of fish occur during the Yushui season$20 There is solid natural grounding behind this. In winter, rivers freeze over, fish retreat into deep water and lie dormant, and the otter finds it difficult to catch prey. Once the Yushui season arrives, temperatures rise, ice and snow melt, rivers thaw, and fish begin swimming actively up toward the surface. Once the fish become active, the otter has an abundant food source, and so it begins catching fish in large numbers. Unable to eat all it catches at once, it lays the fish out along the bank—this is "the otter lays out fish." Thus this phenological sign is, in essence, a marker of "the ice melting, the water warming, and the fish reviving," directly reflecting the core characteristic of the Yushui solar term: "water becoming active once more."

Now let us consider the cultural archetype. Why did the ancients use the character "祭" (sacrifice)—a character laden with ritual significance—to describe the otter's act of laying out fish$21 This was by no means arbitrary. "Sacrifice" is the most solemn act in the ancients' spiritual life. To interpret the otter's laying out of fish as "sacrifice" means that the ancients read, within an animal's behavior, something approaching the solemnity of "ritual propriety" and the germination of "virtue." This reflects a profound conviction of the ancients: that ritual propriety and virtue are not artificial adornments unique to human beings, but a universal nature rooted within Heaven, Earth, and the ten thousand things—one that even birds and beasts can be seen to feel.

This conviction was developed systematically in later texts. We may compare it with another, similar phenological sign occurring somewhat later, after Jingzhe: the ancients often paired "the otter offers fish in sacrifice" with "the jackal offers beasts in sacrifice" (the autumn phenomenon of jackals laying out their prey), together called "the otter's sacrifice" and "the jackal's sacrifice," regarded as the embodiment, in birds and beasts, of the rite of "repaying the root" between Heaven and Earth. The "Monthly Ordinances" chapter of the Book of Rites records "the otter offers fish in sacrifice" as occurring in the first month of spring, and takes it as the phenological basis for the Son of Heaven's duty to accord with the timing of Heaven and enact benevolent governance. In this sense, the otter's laying out of fish is not merely a phenological phenomenon, but a natural parable concerning "the origin of ritual propriety": ritual propriety originates in life's gratitude toward its own source, and this heart of gratitude is shared by Heaven, Earth, and the ten thousand things alike.

At a deeper level, there is significance in the fact that the otter's laying out of fish is listed as the "first sign" of Yushui. During the Yushui season, when water becomes active once more, the very first phenological sign the ancients noticed turns out to be one concerning "repaying the root" and "ritual propriety"—this is by no means coincidental. It seems to convey a message: as we receive the grace of Heaven and Earth's spring rain and welcome the revival of all things, the first thing we must do is "repay the root"—to feel gratitude, to greet this season of life's renewal with a solemn, grateful heart. Ritual propriety (the otter's repayment of the root) comes first, and only then follow trustworthiness (the wild geese heading north) and life (plants and trees sprouting)—this sequence of the three signs of Yushui is itself a condensed spiritual course on how to welcome the spring.

3. The Second Sign, "The Wild Geese Head North": The "Trustworthiness" of Migratory Birds and Moving in Accord with Yin and Yang

The second sign of Yushui is "the wild geese head north" (also rendered "the wild geese arrive"). The "Explanation of Seasonal Instruction" states: "Five days later, the wild geese arrive"—five days after Yushui, the wild geese begin migrating from south to north.

This sign records the migration of the wild goose. The wild goose is a migratory bird, flying south in autumn to avoid the cold and returning north in spring. As the Yushui season arrives and the climate in the north warms, the wild geese fly north in flocks, from their wintering grounds in the south back toward their ancestral home in the north. Having observed this pattern, the ancients listed "the wild geese arrive (in the north)" as the second sign of Yushui.

Why did the ancients attach such importance to the migration of the wild goose, even listing it as a phenological marker of a solar term$22 Because, in the ancients' eyes, the wild goose's migration embodied an exceedingly precious quality—"trustworthiness" (xin). The wild goose's migration follows a highly regular pattern: it invariably flies south in autumn and invariably returns north in spring, never missing its schedule, never falling into disorder. It seems to have signed an eternal covenant with the timing of Heaven, faithfully honoring it year after year. This quality of "moving in accord with the season, keeping time without fail" is the highest model of "trustworthiness." In the wild goose's migration, the ancients saw one of the most trustworthy beings between Heaven and Earth—it moves in accord with the waxing and waning of yin and yang; when yang qi returns north, it returns north; when yin qi advances south, it flies south. Its movements are the most faithful "messenger" of the waxing and waning of yin and yang.

This "trustworthiness of moving in accord with yin and yang" resonates deeply with the astronomical essence of the Yushui solar term. During the Yushui season, the sun moves northward and yang qi gradually flourishes—this is precisely the astronomical cause of the wild geese's return north. The wild geese's return north is, in essence, a faithful response to the astronomical fact of "yang qi returning north." Thus this sign is not merely a biological phenomenon, but an astronomical indicator by which "the birds verify the heavens": when the ancients saw the wild geese return north, they knew that yang qi had indeed returned north, and that Yushui had indeed arrived. The wild goose became a "messenger," delivering to the ancients news of the timing of Heaven.

Within the Confucian system of virtues, "trustworthiness" holds an exceedingly important place. The Master says: "I do not know what use a person can be who lacks trustworthiness" (Analects, "Wei Zheng"). And again: "Without the trust of the people, a state cannot stand" (Analects, "Yan Yuan"). And the wild goose, through its year-after-year, unfailingly punctual migration, provides the virtue of "trustworthiness" with its most vivid model drawn from the natural world.

What is even more worth savoring is that the "V" or single-file formation the wild geese adopt in flight, along with the orderly sequence of elder and younger, leading and following, in which they fly, symbolized, in the eyes of the ancients, "ritual propriety" as well—the order of elder and younger, the ranking of noble and humble. The ancients used "the order of the geese" (yanxu) as a metaphor for the proper order among brothers, and "the flight of the geese" (yanhang) as a metaphor for an orderly procession. Thus this sign carries within it a double moral significance: "trustworthiness" (keeping time without fail) and "ritual propriety" (proper order between elder and younger). Following the first sign of Yushui, "the otter lays out fish" (ritual propriety's repayment of the root), immediately comes "the wild geese head north" (trustworthiness's punctuality and ritual propriety's order)—in these first two signs, the three signs of Yushui have already shown us how these two crucial virtues, ritual propriety and trustworthiness, are rooted within the natural world.

4. The Third Sign, "Plants and Trees Begin to Sprout": Vitality Breaking Through the Soil

The third sign of Yushui is "plants and trees begin to sprout." The "Explanation of Seasonal Instruction" states: "Five days later still, plants and trees begin to sprout"—five days further after the second sign, plants and trees begin to germinate and grow.

Plants and trees beginning to sprout is the most direct and central of the three signs of Yushui. If the first two signs (the otter laying out fish, the wild geese heading north) each indirectly mark the arrival of Yushui from the perspectives of "water" and "sky," then "plants and trees beginning to sprout" directly proclaims, from the most fundamental level of "earth," the very substance of spring—the germination of life.

Why do plants and trees begin to sprout during the Yushui season$23 The answer points directly to the core of the Yushui solar term: because there is now water. In winter, the seeds and root systems of plants lie dormant in dry, cold soil, lacking sufficient moisture to germinate. During the Yushui season, spring rain arrives, the soil is moistened, and temperatures rise accordingly—once these dual conditions of water and warmth are met, dormant seeds begin absorbing water, swelling, and breaking through their husks to sprout, and dormant root systems begin absorbing water and stirring, sending out new shoots. This sign, "plants and trees begin to sprout," is precisely the first fruit borne of the core Yushui characteristic of "spring rain nourishing all things." Without the "water" of Yushui, there would be no "sprouting" of plants and trees. This sign presents the essence of the Yushui solar term—"water nourishing life"—in its most direct and vivid form.

We may also return to the spring spirit Goumang, discussed in Chapter Three. In the name "Goumang," "gou" means "curved" and "mang" means the sharp tip of a newly sprouted plant—precisely the shape a seed takes as it germinates, curving as it pushes upward, its sharp tip just breaking through the soil. The sign of plants and trees sprouting is exactly the moment the spirit Goumang "takes visible form": when we see, during the Yushui season, tender shoots dotting the earth, their sharp tips just emerging, what we see is precisely the spirit Goumang, summoned by the spring rain, awakening the vitality of all things. Phenology (plants and trees sprouting), myth (Goumang), the solar term (Yushui), and the Five Phases (the germination of Wood qi)—in this one sign, all achieve a perfect unity.

From this sign of plants and trees sprouting, we may also apprehend an exceedingly important concept in pre-Qin philosophy—"generation" (sheng). The "Great Treatise, Part 2" of the Book of Changes says: "The greatest virtue of Heaven and Earth is called generation"—the greatest virtue of Heaven and Earth is "sheng" (generating and nurturing the ten thousand things). Plants and trees sprouting is precisely the concrete manifestation, during the Yushui season, of Heaven and Earth's "virtue of generation." And what drives this "generation" is precisely that spring rain which descends from Heaven and nourishes all things. Thus the Yushui solar term is, in the final analysis, a grand activation, in spring, of Heaven and Earth's "virtue of generation," carried out through the medium of "water." The first sign, the otter laying out fish (the rite of repaying the root); the second sign, the wild geese heading north (the trustworthiness of punctuality); the third sign, plants and trees sprouting (the generative virtue of Heaven and Earth)—the three signs of Yushui proceed from ritual propriety, to trustworthiness, to generation, advancing layer by layer, and ultimately converging upon the greatest virtue of Heaven and Earth: "generation" itself.