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The method of pulse-taking lies in the flexibility of the fingers, aligning the "pulse ridge" (the trajectory of the arterial pulsation) with the "finger tip" (the sensitive distal end of the finger). Lu stated: There are various diagnostic methods, all relying on the agility of finger techniques to capture the pulse. The middle finger's upper two segments are longer, while those of the ring and little fingers are shorter, leading to unevenness. If the fingers are spread apart during pressing or lifting, the position may deviate by one inch and nine fen from the standard location; if pressed too closely, it fails to distinguish the Cun, Guan, and Chi positions. By aligning the three fingers evenly, the middle finger rises slightly, ensuring each joint is opposed, turning freely and flexibly. This allows for distinguishing left and right, exterior and interior, internal and external, corresponding to the Five Zang organs, and sensing floating, moderate, and deep pulses. This is the method of positioning the three fingers. Once positioned, using a single finger for pressing and lifting can indeed capture the true pulse, but it is superior to use a single finger without interference, allowing better perception of the pulse's elevation and depression. However, the index finger is thin and agile, the middle finger is thicker, and the ring finger is even thicker and duller. One must use the part of the fingertip that protrudes like a line, called the "finger tip" (Zhi Mu), to press against the pulse ridge. Whether the pulse is surging, large, wiry, or leathery, or fine, thread-like, or minute, there is always a ridge. It is truly like the eye seeing objects, revealing beauty and ugliness clearly. Hence, ancients referred to pulse diagnosis as "looking at the pulse," illustrating its utility. I often see practitioners who cherish long fingernails using the fleshy part of the finger or below the joints to diagnose, which is akin to having eyes on the neck, armpits, chest, or flanks. It is essential to grasp the key principles to seek the root of the disease.

Before diagnosis, everyone claims to be sharp, asserting knowledge of which position corresponds to which pulse and what image each pulse presents. Yet, upon clinical examination, one might perceive a floating pulse as wind, yet feel it is not truly floating nor wind; a tight pulse as cold, yet feeling it is not truly tight nor cold; a surging pulse as fire, yet feeling it is not truly surging nor fire; a rapid pulse as dryness, yet feeling it is not truly rapid nor dry; a deficient pulse as summerheat, a soggy pulse as dampness, yet feeling they are not truly deficient or soggy, and cannot be simply named summerheat or dampness. Such ambiguities make differentiation impossible. Subsequently, analyzing the six positions and six pulses in isolation leads to disjointed reasoning. (Isolated analysis is a major flaw in pulse diagnosis; I sigh that many today commit this error. Zhang Lu said diagnosing pulse is like praying to a clay idol—sometimes effective, sometimes not.) How can one know that disease follows a single principle, and the pulse has no duality? Grasping one aspect allows the pulse to be judged. Grasping the unique manifestation within the pulse allows it to be judged further. (This extracts the essence of pulse theory from the concept of "uniqueness".) The meaning of "unique" (Du) is multifaceted. For instance, if most positions are normal but one shows slight deviation, the disease resides there, justifying the term "unique." Or, if the five pulses corresponding to the five Zang organs appear mutually, but one specific pulse dominates in the six positions, indicating the disease root is hidden there, further justifying "unique." The meaning of uniqueness is limited to these aspects. Thus, the *Neijing*’s *Tribune Nine Views* mentions unique enlargement, shrinkage, speed, slowness, heat, and cold. A unique and strong pulse indicates excess; a unique and weak pulse indicates deficiency. A unique pulse that is forceful and possesses "Shen" (Spirit/Vitality) is strong but not excessive. (Forcefulness must include Shen. Li Dongyuan stated: In pulse diagnosis, seek the presence or absence of Shen. Six beats per respiration or extreme rapidity indicate heat; forcefulness in the pulse implies Shen. Three beats or sluggishness indicate cold; forcefulness implies Shen. With heat and Shen, clear the heat, and Shen remains; with cold and Shen, dispel the cold, and Shen remains. Cold and heat pulses without force or Shen have no basis for clearing heat or dispelling cold. Lin Zhihan commented: Li’s argument reaches profound truth. However, defining Shen merely as "forcefulness" may not fully capture its subtleties. Wang Zhizhong added: Forcefulness accompanied by luster and smoothness. This is an advancement. Xiao Zi Ge wrote: Light, clear, steady, and thick within the muscles, naturally reflecting the central image. This represents further progress.) A unique pulse that is harmonious, slow, soft, and weak is weak but not harmful. Fake uniqueness is easy to identify, but true uniqueness is difficult to comprehend. Grasping the key to find uniqueness reveals it everywhere; losing the key makes it unattainable. (This peels back layers from the concept of "key" to reveal refined meaning.) Therefore, those skilled in discussing uniqueness first understand the origin of Yin and Yang (Kidney Water is the origin of Yin, Kidney Fire is the origin of Yang), the root of Qi and Blood (Kidney Water is the root of Blood, Kidney Fire is the root of Qi, and the Spleen and Stomach are the sources of generating Qi and Blood) to seek the root of uniqueness. (Knowing the root leads to knowing the key; knowing the key leads to knowing uniqueness.) Then, understanding the principles of compliance and opposition (Annotations note: Surging and large in Spring/Summer is compliant; deep and fine is opposing. Deep and fine in Autumn/Winter is compliant; surging and large is opposing. In men, left dominance is compliant; in women, right dominance is compliant. For external contraction: Yang disease with Yang pulse is compliant, Yin pulse is opposing; Yin disease with Yang pulse is also compliant. For internal injury: Yang disease with Yang pulse is compliant, Yin pulse is opposing; Yin disease with Yin pulse is compliant, Yang pulse is opposing.), the way of selection and rejection (Compliant pulses like those with Root, Shen, and Stomach Qi are selected; opposing pulses like those being destroyed, separated, or exhausted are rejected.), and the up/down, coming/going, arrival/stopping of the pulse, clearly understood in the mind, allows one to recognize the appropriate manifestation of uniqueness. (Hua Shi stated: Up is Yang, Coming is Yang, Arrival is Yang; Down is Yin, Going is Yin, Stopping is Yin. Up refers to movement from Chi to Cun, where Yang arises from Yin. Down refers to movement from Cun to Chi, where Yin arises from Yang. Coming refers to Qi rising from the bone/flesh level to the skin surface. Going refers to Qi descending from the skin surface back to the bone/flesh level. "Arrival" marks the beat, "Stopping" marks the breath pause.) Only then, when clinically diagnosing, seeking the location of uniqueness (where uniqueness lies in clear selection/rejection and awareness of weight/importance), does uniqueness exist; clarifying the extent of uniqueness (where uniqueness reaches through knowing roots/tubers and recognizing truth/falsehood), does uniqueness emerge. Thus, one may perceive uniqueness in the upper region, but it actually lies lower; perceive it in the left, but it lies in the right; perceive it in the Fu organs, but it lies in the Zang organs; perceive it in the Exterior, but it lies in the Interior. This uniqueness can be intuitively grasped (uniqueness offers the joy of resourcefulness) but cannot be fully conveyed verbally (uniqueness contains ineffable subtleties); it can be known individually (uniqueness implies adaptive transformation) but not shared collectively (uniqueness involves solitary insight difficult to share with contemporaries). Without the clarity of individual knowledge (merely reading quick medical guides or He Huanshu’s Pulse Classic, how can one know uniquely?), without the authenticity of individual vision (merely seeing transient or localized diseases, how can one see uniquely?), without the firmness of individual adherence (merely following contemporary hearsay or proliferating prescription books, how can one adhere uniquely?), and claiming "I alone am unique," (advancing the concept of uniqueness layer by layer, generating subtle meanings,) although uniqueness is correct, it risks becoming the uniqueness of an isolated ignoramus; although uniqueness is correct, it risks becoming the uniqueness that harms others. (Xiu once stated four medical errors: 1. Ignorance of terminology, 2. Superficial engagement with prescriptions, 3. Rigid adherence to a single book, 4. Plagiarizing dross. These four errors inevitably harm people.) Can such behavior be called true uniqueness or adaptive uniqueness? Therefore, the art of pulse-taking values flexibility (a phrase summarizing everything). If rigid and unchanging, one becomes lost in every direction, unable to examine uniqueness, seek truth, and determine the destination of the disease.