开篇：宇宙的韵律——从伏羲画卦到《周易》的诞生

传说中，伏羲氏坐于黄河之滨，观天地之文，察万物之象，于是画下八卦。这个被《系辞传》浓缩为“仰则观象于天，俯则观法于地”的瞬间，实际上是一个历时数万年、遍布东亚大陆的认知革命的缩影。当我们将神话的滤镜擦拭干净，露出其下的考古地层，会发现阴阳符号的诞生并非天启，而是原始先民在冰期结束后的温暖期，面对 exploding 的自然信息量，发展出的一套前所未有的压缩编码系统。The myth of Fuxi painting the trigrams by the Yellow River, as succinctly captured in the *Xici Zhuan* (“Gazing up, he observed the patterns in the heavens; looking down, he examined the models on the earth”), is in reality a microcosm of a cognitive revolution that spanned tens of thousands of years across East Asia. When we wipe away the veneer of mythology and peer into the archaeological strata beneath, the birth of the yin-yang symbols reveals itself not as a divine revelation, but as a pioneering data-compression system developed by early humans in the post-glacial warming period to cope with an exploding volume of natural information.

This chapter is not a mere retelling of an ancient legend. It is an excavation. We will dig through layers of narrative—from the Neolithic symbols etched on bone and pottery to the philosophical crystallization in the *Zhou Yi*—to reconstruct the “birth epic” of the *Yijing*. Our inquiry begins with a fundamental question: How did a linear, alphabetic-like system of thinking (the eight trigrams, *bagua*) emerge from the holistic, pattern-based cognition of prehistoric hunter-gatherers and early agriculturalists? The answer lies in a specific epistemological shift, a new way of seeing that transformed the flux of reality into a stable, yet dynamic, symbolic matrix.

**一、神话的考古学：当河图洛书遇见贾湖骨刻**

The standard narrative of the *Yijing*’s origin, as found in classical texts like the *Shiji* (Records of the Grand Historian), presents a linear, almost corporate succession: Fuxi creates the eight trigrams; King Wen of Zhou expands them into the sixty-four hexagrams; the Duke of Zhou writes the line statements; Confucius and his disciples compose the *Ten Wings*. This is a history of authors and texts. But the archaeological record tells a different, more profound story—one not of writing, but of proto-writing; not of a single genius, but of a collective, millennial endeavor to map the rhythms of existence.

In 1987, at the Jiahu site in Wuyang, Henan, archaeologists unearthed a set of tortoise shells and cattle scapulae dated to approximately 6600-6200 BCE. Among them, several bore a series of deliberate, ordered incisions. The most famous is the “Jiahu Oracle Bone” (贾湖骨刻), with a pattern of six dots arranged in two rows of three. While some scholars, like Li Xueqin, have cautiously suggested a possible connection to the later *bagua* arrangement, the mainstream view is more agnostic. Yet, its significance is not in proving a direct lineage, but in demonstrating a cognitive capacity: the deliberate ordering of discrete marks into a non-random, meaningful pattern long before the advent of fully developed writing. It is the grammar before the sentence.

More compelling are the symbols from the Shuangdun site in Bengbu, Anhui (c. 7300-6900 BCE), and the Lingjiatan site in Hanshan, Anhui (c. 3800-3300 BCE). The Shuangdun pottery signs include double dots, concentric circles, and cruciform shapes. The Lingjiatan jade plaques and turtleshells feature intricate, symmetrical designs, including what appears to be a “heaven-round earth-square” motif (天圆地方) millennia before it appears in classic texts. The most stunning artifact is the “Lingjiatan Jade Turtle” (凌家滩玉龟), its shell engraved with a grid of dots that some, like archaeologist Wang Shan, have interpreted as a primitive “Hetu” (River Diagram) pattern.

These are not the *Yijing*. They are its pre-verbal, pre-philosophical ancestors. They represent a stage where the primary concern was not yet “change” (*yi*), but “pattern” (*wen* 文). The cognitive leap was from perceiving isolated phenomena (a flash of lightning, a cluster of stars, the growth rings of a tree) to perceiving and reproducing relational structures. The incisions on bone and the engravings on jade are externalizations of an internal model: the world is not chaos, but possesses an underlying order that can be represented, however abstractly. This is the soil from which the *Yijing*’s symbolic system would eventually grow. The “myth” of Fuxi, therefore, can be re-interpreted as a cultural memory of this vast, prehistoric project of pattern-making, condensed into a single, heroic founder figure for the sake of narrative coherence.

**二、仰观天象，俯察地理：一场静默的认知革命**

The phrase “仰观天象，俯察地理” is often rendered poetically. We must understand it as a technical description of a new research methodology. It denotes a shift from *participation* to *observation*, from being embedded in a mythic, animistic world to standing back and *mapping* it. This was not a sudden event but a gradual, multi-front evolution tied to the Neolithic Revolution itself—the shift from foraging to farming.

Agriculture demanded precision. The difference between a successful harvest and famine was a matter of days in planting, a few inches in flood prediction, an accurate reckoning of seasonal cycles. This created an unprecedented pressure to *measure time and space*. The sky, with its regular motions of the sun, moon, and stars, became the ultimate clock and calendar. The “Big Dipper” (北斗) rotating around the pole star provided a nightly, year-round reference. The solstices and equinoxes marked the key nodes of the agricultural year. The earliest Chinese star maps, like those found in the Mawangdui silk texts, show a focus on circumpolar stars precisely because they never set—they are the eternal, reliable reference frame.

Simultaneously, “俯察地理” involved the mapping of the land. The need for irrigation, defense, and settlement planning led to the surveying of territories. The famous “九宫” (Nine Palaces) grid, later integral to *Yijing* applications like the “Later Heaven” arrangement, may have its roots in Neolithic land division and well-field systems (井田). The square, associated with earth, order, and the human realm, became the fundamental geometric template for organizing space.

The fusion of these two modes of observation—the circular, rotating heavens and the square, partitioned earth—is the core cosmological act that birthed Chinese thought. It is embodied in the very design of the *bagua*. The *Hou Tian* (Later Heaven) arrangement, attributed to King Wen, places *Kun* (Earth, ☷) in the southwest and *Qian* (Heaven, ☰) in the northwest, creating a dynamic interplay where the square earth supports and the circular heaven revolves. This is not a random diagram; it is a schematic of the Neolithic worldview: a square field under a rotating sky. The eight trigrams are the eight cardinal and intercardinal directions made meaningful, each a vector combining a heavenly (three solid lines) or earthly (three broken lines) quality.

This cognitive revolution can be modeled as a process of dimensional reduction. The raw sensory data—thousands of stars, countless landscape features, infinite weather patterns—were compressed into a two-dimensional, binary-coded system: the broken line (--) and the solid line (—). This was a monumental abstraction. It meant that the essence of any phenomenon—the growth of a plant, the behavior of a beast, the outcome of a battle—could, in principle, be represented by a configuration of these six lines. The world became legible. The *Yijing* is, in this sense, the first great work of applied complexity science in human history, offering a toolkit for navigating a world perceived as fundamentally ordered yet perpetually in flux.

**三、“易”字的三重律动：变易、不易与简易的哲学基石**

The title of this book, and the entire philosophical edifice of the *Yijing*, rests on the single, enigmatic character: 易. Its modern meaning is “easy” or “change,” but its ancient form, found on Shang dynasty oracle bones, is a pictograph. The top part is “日” (sun), the bottom part is “月” (moon) or possibly a representation of a lizard or chameleon (which changes color).