When did the guqin begin to show its notes?
Anyone who has studied the guqin knows the thirteen small markers set into its surface. They are called hui.
A beginner learns them early. The seventh hui lies near the center of the instrument. The other markers help the player locate important notes along the strings. When the right hand plucks a string and the left hand lightly touches one of these positions, a clear overtone appears — bright, pure, and almost weightless.
The hui are not frets. They do not divide the strings mechanically, nor do they press the strings down against the surface of the instrument. They are markers: visible points that correspond to the hidden mathematical structure of the string. They help the player find sound.
A Small Mark with a Large History
The word hui has a much older history than its modern guqin meaning. The Shuowen Jiezi, the great dictionary compiled during the Eastern Han, explains hui as a kind of woven or tied cord. One definition describes it as “three interwoven cords.”
The Cihai dictionary gives a related explanation under the entry for qin hui: a cord used for tying the strings of a qin. These definitions do not describe the small dots on the surface of the modern guqin. They sound much closer to what qin players often call the rongkou — the silk knots or cord fastenings associated with the instrument.
A word can exist long before it acquires its later technical meaning. The presence of the word hui in an early text does not automatically prove that the guqin already had thirteen visible markers.
For a long time, some scholars interpreted a passage in Qi Fa, written by Mei Cheng during the Western Han, as evidence that the guqin already possessed such markers. A comparative reading suggests another possibility.
The text Fan Yin, preserved in the Peking University collection, contains a corresponding passage in which the word gu, or “穀,” appears where Qi Fa has yue, or “约.” Read together, the two passages suggest that both terms refer to the cord fastenings of the instrument, not to the later hui markers used to locate notes.
If this interpretation is correct, then Qi Fa cannot be used as secure evidence for the existence of visible qin hui in the Western Han. The question remains open.
The Qin Before the Hui
Ancient qin-like instruments were excavated from the tomb of Marquis Yi of Zeng in Hubei and from the Mawangdui tombs in Changsha. These instruments belong broadly to the Warring States period and the early Han dynasty.
In the surviving images and descriptions of these instruments, there is no clear evidence of the thirteen visible hui that every modern player recognizes. This does not prove that early players had no knowledge of harmonic positions. It only tells us that the markers were not yet visibly established in the form familiar today.
A player may know where a sound lies without having a dot placed beneath the finger. Many musical traditions begin in the ear before they become fixed in writing or marked on an instrument.
How Did Early Players Find the Notes?
Before visible hui appeared, how did qin players find their positions? The most reasonable answer is: through listening.
The strings of the qin contain a natural mathematical order. When a string is divided into certain proportions, the resulting harmonic points produce sounds that correspond to one another. Divide the effective length of a string in half, and the point at the center produces a powerful overtone. Divide the string into three parts, and the one-third and two-thirds positions produce corresponding harmonics. Divide it into four parts, five parts, six parts, and so on, and more harmonic relationships appear.
The player does not need an external tuning system to discover this. The qin does not depend on an absolute concert pitch in the way a piano does. Its most important relationships are internal. As long as the strings are tuned in relation to one another, the music can function.
Over generations, players would have learned these locations through experience. A master could guide a student’s hand. A student could remember the sound. The knowledge existed as a physical and auditory tradition, even before it became visible on the surface of the instrument.
The hui did not create the harmonic structure. They made the structure easier to find.
From Mathematics to Music
The thirteen hui are not simply thirteen equally spaced dots. Their positions come from the harmonic divisions of the string. The guqin player can use them to produce fan yin, or harmonics, and they also provide reference points for an yin, the stopped notes created by pressing the string.
A string is not an empty line. It contains a system of relationships. The hui make some of those relationships visible. A player sees a point and hears a pitch. The eye and the ear begin to work together.
What had once depended almost entirely on memory, listening, and physical intuition could now be taught through a stable visual system. The teacher could say: “Place your finger at the seventh hui.” A hidden sound had acquired a visible address.
Why Thirteen?
There is a familiar explanation for the number thirteen. The twelve main hui are said to correspond to the twelve months of the year, while the thirteenth represents the intercalary month — the additional month inserted into the traditional lunar calendar when necessary.
This interpretation fits the ancient Chinese habit of connecting human order with cosmic order. But the symbolic explanation does not prove that the number thirteen was originally chosen because of the calendar. It may be a later interpretation placed over a system that first developed from musical necessity.
The technical system may have come first. The cosmological explanation may have come afterward. Or perhaps the two developed together.
From Hidden Hui to Visible Hui
Perhaps early players already knew the important positions by ear. But as the guqin became more closely associated with the literati, the need for a teachable system grew.
The instrument became part of the ideal education of the cultivated person. A visible marking system made it easier to connect written instructions with physical positions. It made the relationship between the score, the hand, and the string more stable.
One may speculate that visible hui helped transform the qin from a tradition dependent on exceptional listening ability into a discipline that could be learned by a much larger class of people. But this remains a hypothesis, not a documented historical statement.
What we can say with confidence is that the visible hui changed the way the instrument could be taught.
The Materials of the Hui
The hui are functional, but they are not without beauty. Most are made from carefully polished shell, often with the soft, iridescent glow of mother-of-pearl. On finer instruments, makers may use gold, jade, or other precious materials.
A particularly refined example is William Xu’s Erlong Xizhu qin — “Two Dragons Playing with a Pearl.” Its hui are made from a combination of gold, Hetian jade, and Nanhong agate. The seventh hui forms the central point of the instrument, while the jade and agate markers are arranged symmetrically on either side.
Seen up close, each material catches the light differently. Gold gives off a warm glow. Hetian jade carries a quieter, softer tone. Nanhong brings a deeper red into the dark lacquer surface.
The hui are not decoration added after the instrument was finished. Their arrangement follows the acoustic geometry of the qin. The eye sees the order that the ear uses to find the sound.
This qin is not an illustration from an old catalogue. It is a living instrument, kept close at hand and still available to be played. Its hui continue to turn the invisible structure of sound into something the hand and eye can approach.
The First Clear Evidence
The earliest convincing textual evidence for the qin hui appears in the Wei and Jin period.
Ji Kang’s Qin Fu contains the phrase:
徽以钟山之玉
The hui are described in connection with jade from Mount Zhong. Here, hui is no longer merely a cord or fastening. It clearly points toward a marker set into the surface of the qin.
The surviving notation of Jieshi Diao · You Lan also contains references that indicate the use of hui positions. Visual evidence appears as well. The Southern Dynasties brick relief known as The Seven Sages of the Bamboo Grove and Rong Qiqi depicts Ji Kang playing the qin. The instrument shown in the image appears to contain thirteen visible markers.
Together, these sources place the established system of qin hui somewhere between the late Han and the Wei-Jin period, with the thirteen-marker system becoming more clearly formed by the Eastern Jin.
This does not give us a single year. It gives us a historical window.
What the Hui Made Possible
The appearance of the hui had consequences far beyond decoration. They made harmonic positions easier to locate, helped the player produce pure and stable overtones, and gave the left hand a visual map for pressing notes and moving across the string.
They also influenced the development of qin notation. A qin score describes the action of the hand: which string, which finger, which direction, which technique, and which position. The hui allowed a musical gesture to be connected to a precise place on the instrument.
The qin is not built around the equal-tempered keyboard. Its pitch relationships arise from the natural divisions of the string. The hui do not eliminate the need for the ear. They give the ear somewhere to begin.
A Dot Between Heaven and the Hand
It is tempting to think of the thirteen hui as simple markers on an old instrument. They are much more than that.
They represent a moment when sound became visible. Before the hui, a player may have found the harmonic positions through listening, memory, and the guidance of a teacher. After the hui, the instrument carried a map of its own inner order.
A small mark could connect mathematics, the body, the ear, and the imagination.
The player sees the hui. The finger moves toward it. The string vibrates. A pure tone rises from the wood.
We may never know the exact moment when the first hui was placed on a qin. But we know what happened afterward. The qin became easier to teach. Its techniques became easier to preserve. Its sound became easier to pass from one generation to the next.
The thirteen hui did not make the guqin ancient. They helped make its ancient voice transmissible.
They are not merely thirteen dots on a wooden surface. They are thirteen small signs that tell the hand where memory lives.
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