What Is Shou? Why Must Diagnosis First Establish a Starting State?

The word Shou in “Sixty Shou” is not rhetorical.

The Mirror Classic of Bian Que defines it explicitly:

Shou is the beginning of tone and also the establishment of qi; it is the mechanism of qi and also the manifestation of voice; it is the tuning of lü and also the movement of the pulse.

Shou is therefore a starting state that binds tone, qi, voice, lü, and pulse together.

Why must a Shou be established?

Qi transformation in the body is continuous. Without first selecting a starting point, one cannot say how far qi has shifted, where it has gone, or whether it is moving forward or in reverse.

It is like describing time in a day: without choosing midnight or sunrise as a reference, phase is difficult to express consistently.

The Mirror Classic first observes pulse-breath, tone-lü, and the position at the settling of the breath, then compresses the current state into a Shou.

The text says:

Palpate and trace the pulse and breath, obtain the qi of tone and lü, establish the She of pulse movement; this becomes the Shou of tone and breath, from which the principles of the pulse are sought.

Establishing Shou therefore does not begin from birth year, disease name, or subjective guesswork. It begins from actual observation of pulse and breath.

What information is needed to establish Shou?

The following passage gives three steps:

From the divisions of pulse movement in inhalation and exhalation, know the Hou of the pulse-lü; from the position of pulse movement when the breath settles, know the tone of pulse and breath; combine tone and lü, and thereby measure the manifestations of the Sixty Shou.

This can be organized as:

1. observe the distribution of pulse movements within the respiratory cycle to determine Hou;
2. observe where pulse movement falls at the settling of the breath to determine tone;
3. combine tone and lü to determine the manifestation of the Sixty Shou.

This is close to an “input → encoding → localization” procedure.

Shou is not the disease conclusion

This point is crucial.

Identifying a Shou does not directly produce a disease name. Shou is only the starting point. The text says that once tone is established, one knows where Shou begins; once Shou is established, one then knows the qi movement of She. One must still infer She, examine qi movement, judge change, and only then discuss disease.

Directly equating a Shou with a disease would skip the rest of the algorithm.

Shou provides a common reference point

The same person’s pulse and breath are continuously changing. Shou temporarily “captures” a state with a defined tone-lü position so that subsequent shifts have a reference.

Establishing Shou is therefore the creation of an operable initial condition within continuous physiological signals.

The next article examines how Shou leads to She and why the text says “She is the manifestation of Shou; Shou is the qi of She.”