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Huangdi asked: How should one observe the pathogenic qi? (This refers to observing the pathogenic qi that has invaded the body, not the arrival of needle qi after acupuncture.) Qibo replied: When pathogenic qi moves from the collaterals into the meridians, it resides within the blood vessels. (Pathogenic qi enters from shallow to deep, so it must first enter from the collaterals and then proceed into the meridians. "Reside" means to stay or dwell.) At this time, the coldness of the pathogenic qi and the warmth of the healthy qi have not yet harmonized, resembling waves rising; they come and go at times, thus having no fixed presence. (The nature of pathogenic qi is cold, while that of healthy qi is warm, hence they do not accord. Blood and qi are originally still but are disturbed by pathogenic qi, just as water is originally calm but stirred by wind, thus resembling rising waves. The arrival of pathogenic qi is characterized by rapid movement and change, coming and going without a fixed location.) Therefore, it is said that when the pathogenic qi arrives, one must press to stop its progression and immediately apply acupuncture to drain it. (When the pathogenic qi first arrives, it is still weak, so one can press the affected area to restrain it and then apply draining techniques. By early obstructing its momentum, major pathogenic factors can be dispersed, preventing severe harm.) One should not drain when encountering the peak surge of the pathogen. (If treatment is not initiated early, the pathogen will surely become strong. Although the pathogen may be abundant, the meridian qi might not necessarily be solid; therefore, careful examination is required, and one should not indiscriminately drain simply because the pathogen appears vigorous.) True qi is equivalent to meridian qi. If meridian qi is too deficient, it is said that "one should not meet [the arriving pathogen] with tonification," which is what this refers to. (If true qi is not substantial, meeting the pathogen with draining will cause the true qi to become excessively deficient even if the pathogen is expelled; hence, it is said that "one should not meet the arriving pathogen." Note: *Xiao Zhen Jie* states: "One should not meet the arriving pathogen" refers to not using tonification when qi is excessive. That text discusses tonification, whereas this passage discusses draining; although the texts seem contradictory, each holds profound meaning and should be examined from both perspectives.) Therefore, it is said that if observing the pathogen is not prudent, and one drains after the major pathogenic qi has passed, true qi will be depleted. Once depleted, it cannot recover; the pathogen will return, and the disease will accumulate further. (Pass refers to having gone by. Failing to examine deficiency and excess, and draining the pathogen that has already left, instead damages true qi. The pathogen will inevitably take advantage of the deficiency to return, worsening the condition.) Hence, it is said that "one cannot pursue [the departing pathogen]," which is what this refers to. (*Xiao Zen Jie* states: "One cannot pursue the departing pathogen" means one should not use draining when qi is deficient.) There should be no delay of even a hair's breadth; one must wait for the pathogen to arrive before inserting the needle to drain. Whether acting too early or too late results in the exhaustion of blood and qi, making the disease incurable. (Inserting the needle to drain refers to applying draining methods. To drain the pathogen, timing is crucial at the moment of the pathogen's arrival. No delay of even a hair's breadth means not missing the slightest opportunity. If done too early, the pathogen has not yet arrived; if done too late, the major pathogenic qi has passed. This merely exhausts blood and qi without controlling the disease. "Xia" here means to subdue or control.) Therefore, it is said that knowing how to seize the opportunity for treatment is like triggering a crossbow mechanism, while not knowing how to seize it is like striking a wooden mallet. Thus, it is said that those who understand the Dao of timing will not miss an opportunity of even a hair's breadth, while those who do not understand timing will strike without effect. This is what is meant. (Ji refers to the trigger mechanism of a crossbow. Zhui refers to a wooden mallet. Knowing the timing and acting accordingly allows for immediate response, easy as firing a crossbow; ignoring timing and attacking blindly leads to stubborn ineffectiveness, difficult as striking a wooden mallet. Note: The meanings discussed above are also found in Chapters 1 and 7.) Huangdi asked: How should tonification and draining be applied? (This follows up on the previous discussion regarding whether to first consolidate healthy qi via tonification or attack pathogenic qi via draining when it moves from collaterals into meridians.) Qibo replied: This is a method of attacking the pathogen. Withdraw the needle quickly to remove stagnant blood, thereby restoring true qi. (Once infected by pathogen, one should immediately attack it, but treatment should be prompt. Quickly withdrawing the needle to expel bad blood allows true qi to restore itself; this demonstrates that draining contains elements of tonification.) This pathogen is newly acquired, flowing freely without a fixed location. Pushing it moves it forward, pulling it stops it. Needling against its direction to release warm blood, and extracting this blood, cures the disease immediately. ("Rongrong" describes a flowing state. For pathogens newly invading the human body, they reside superficially in the collaterals without a fixed location, so pushing moves them forward and pulling stops them, indicating ease of treatment. Whenever treating collateral diseases, one must extract blood. Releasing warm blood ensures the pathogen departs with it, curing the disease immediately. Warm blood refers to hot blood.) Huangdi said: Excellent. However, when true qi and pathogenic qi combine, and there is no significant pulse fluctuation, how should one observe? (True and pathogen combining refers to the initial clash between healthy and pathogenic qi. Lack of pulse fluctuation indicates that clinical manifestations have not yet appeared. Failure to observe this accurately easily leads to confusion.) Qibo replied: Carefully examine the fullness and emptiness of the three regions and nine pulses to regulate the condition. (By examining the pulses of the three regions and nine positions, one can determine fullness and emptiness and apply regulation.) Observe instances where the pulses on the left and right, upper and lower, are discordant or diminished, and examine the affected zang organs to predict the outcome. (Discordance refers to deviations from normal patterns, such as in the Seven Diagnoses, where pulses do not correspond appropriately. Diminution refers to the depletion of form and qi. By observing the left-right and upper-lower pulses of the three regions and nine positions, one can identify the location of the disease and the associated zang organ, allowing prediction of yin-yang and climatic conditions. The meanings of discordance and diminution in the three regions and nine pulses are detailed in Pulse and Color Classification, Chapters 5 and 25.) Those who do not understand the three regions cannot distinguish yin and yang, nor differentiate heaven and earth. (Inability to distinguish yin and yang means ignorance of the reversals and順逆 of zang-fu organs. Inability to differentiate heaven and earth means ignorance of the ascending-descending and floating-sinking dynamics of qi.) Use the Earth region to observe lower-level pathology, Heaven region for upper-level pathology, and Human region for middle-level pathology. Regulate the Middle Palace (Zang Qi) to stabilize the three regions. (Understanding the three regions allows observation of pathology in the upper, middle, and lower parts. Middle Palace refers to Zang Qi. All pulse and symptom manifestations of the three regions and nine positions are primarily governed by Zang Qi. When qi is smooth, auspiciousness prevails; when qi rebels, misfortune ensues. Thus, regulating the Middle Palace stabilizes the three regions.) Therefore, it is said that if one does not know the three regions, nine pulses, and the location of pathological pulses, even if major pathogens overwhelm the body, the physician cannot prevent the harm. (Da Guo refers to the excessive invasion of major pathogens.) Punishing the innocent is called great confusion, disrupting the great meridians, causing true qi to become irrecoverable, mistaking excess for deficiency, pathogen for true qi, practicing acupuncture without principle, becoming a thief of qi, depriving people of healthy qi, treating compliance as rebellion, scattering Ying and Wei, losing true qi, leaving pathogen alone inside, cutting off life span, bringing premature death—all due to ignorance of the three regions and nine pulses, thus failing to sustain longevity. (Ignorance of pathogen-healthy balance and deficiency-excess states leading to reckless attacks is termed punishing the innocent, robbing true yuan, killing people secretly. This is the most severe error. Those wishing to leave merit to descendants should take this as a stern warning.) Furthermore, ignorance of integrating the four seasons and five phases leads to incorrect application of mutual overcoming, abandoning the attack on pathogen to attack healthy qi, cutting off life span. (Ignoring integration with four seasons and five phases and incorrectly applying mutual overcoming violates heavenly harmony. Abandoning pathogen attack to assault healthy qi is inappropriate伐, thus cutting off life span.) When pathogen newly arrives, it has no fixed location; pushing moves it forward, pulling stops it. Encountering it and draining it cures the disease immediately. (Repeating this emphasizes the importance of early treatment.)