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When Kidney Water (Shen Shui) is exhausted, essence and spirit (Jing Shen) are depleted; this constitutes a syndrome of internal injury to the Liver and Kidneys. The preceding text states that wind pathogens lodging in the body disrupt Qi, leading to the loss of essence; this belongs to cases where external pathogens invade and subsequently damage the interior, which is significantly different in meaning. (It is only when the following text mentions "Kidney Qi is injured, and the high bones are ruined" that it explains the exhaustion of Kidney Water and depletion of essence.)

If one overindulges in food, tendons and vessels become lax and separated, and hemorrhoids form in the intestines. (Excessive fullness causes the stomach and intestines to become distended; distension leads to tendons and vessels becoming loose and disconnected, resulting in hemorrhoids at the intestinal region. The *Bi Lun* [Treatise on Bi Syndrome] states: "If food intake doubles, the stomach and intestines are injured." Note: The aforementioned three causes all stem from the premise of wind pathogens lodging in the body. Once affected by wind, if one does not exercise greater caution, the disease will worsen daily. Injury from overeating primarily affects the stomach and intestines; how could it involve tendons and vessels? Moreover, within the human body, large tendons bind the bones, small tendons constrain the skin, and Qi and blood vessels penetrate internally and externally. If excessive eating causes severe injury, filling the stomach and intestines, Qi becomes stagnant and the skin tightens, causing horizontal obstruction. Tendons and vessels become tightly bound, nearly severing, which is termed "horizontal separation" (Heng Jie). Furthermore, chronic overeating leads to the accumulation of heat toxins, inevitably resulting in dysentery with pus and blood. If diarrhea persists, pus and blood flow laterally, forming hemorrhoids. Hemorrhoids are sinus tracts beside the anus.)

If one drinks excessively, Qi rebels upward. (Excessive drinking causes the lobes of the Lung to expand and rise, leading to rebellious Qi rushing upward. Note: Wine has a mobile nature, a pungent taste, and hot Qi. In moderation, it harmonizes Blood and moves Qi; in excess, it fosters anger and forgetfulness, breaks Blood, and disorders Qi. Because it disorders Qi, it causes Qi rebellion; is it merely about the expansion of lung lobes?)

If one engages in strenuous sexual activity, Kidney Qi is injured, and the high bones (lumbar vertebrae) are ruined. ("Strenuous" refers to forceful intercourse; "high bones" refer to the prominent bones of the waist. However, forceful intercourse consumes Essence; consumed Essence injures the Kidney; injured Kidney leads to dryness of the marrow inside; thus, the high bones are ruined and unusable. Note: The union of male and female generates Essence, through which all things are transformed; this is the great ethic of humanity and the righteous path of Heaven and Earth. If one acts according to propriety without reckless indulgence, how could ruin occur? Only those fond of lust, indulging in pleasure, gradually deplete Essence and Blood. When strength fails, they may still rely on foreign substances and force themselves to act, thereby injuring and ruining themselves. Is this not due to exerting force when powerless? Especially so when engaging in intercourse after pathogens have entered.)

The key to Yin and Yang is that Yang must be dense to secure Yin. If the two are not in harmony, it is like Spring without Autumn, or Winter without Summer... Therefore, if Yang is hyperactive and cannot be dense, Yin Qi will perish. (...Note: Although Yin and Yang are mutually rooted, the role of Yang is particularly critical. Thus, it is repeatedly detailed to summarize: to nourish Yin, one must first secure Yang, avoiding leakage that leads to collapse. However, Yang fails to be dense mostly due to arrogance in its strength, while indulging in desires. Soon, Yang Essence is exhausted, and the stored Yin Qi also perishes completely. The commentary claiming Yang strengthens itself is illogical.)

Exposure to wind and cold/dew leads to alternating chills and fever. (Note: The following five paragraphs describe precisely the harms caused by Yang failing to be dense. "Dew" (Lu), as annotated, means exposing the body; for those covered by clothes and blankets, do pathogens not strike? Here, "Lu" refers to mist and dew. Wind is a Yang pathogen, dew is a Yin pathogen; both invading the person can cause chills and fever, especially since the text previously warned against exposure to mist and dew.)

Therefore, injury to Wind in Spring, with pathogens lingering, leads to severe diarrhea (Dong Xie). (Wind Qi connects to the Liver; in Spring, Liver Wood is vigorous. Wood overacting on Spleen Earth causes severe diarrhea. Note: "Lingering" means缠绵 (lingering/unresolved). When Wind pathogens enter the hair follicles and interstices, they often cause chills/fever, headache, or hypochondriac pain. If not released via sweating, they linger unresolved, stagnating in the stomach and intestines. Wood's nature conquers Earth; Earth cannot withstand it, leading to Spleen deficiency and severe diarrhea.)

Injury to Summerheat in Summer leads to malaria (Nie) in Autumn. ("Nie" refers to old age or emaciation. Note: Pathogens lurking in the Zang organs must wait for the corresponding seasonal command to emerge. Autumn is the season of gathering/convergence. Why does Summerheat injury manifest as malaria in the autumnal gathering season? Summerheat is a Heat pathogen; Heat prefers free flow and dislikes stagnation. Summerheat should exit with sweat. If sweat does not occur, and the time of convergence arrives, Heat pathogens accumulate, initially causing malaria, and severely causing emaciation/Nie. Thus, malaria without sweat requires profuse sweating to heal.)

Injury to Dampness in Autumn leads to rebellious Qi and cough, developing into Wei Ju (flaccidity and cold limbs). (Dampness is the moisture of the earth. When Autumn dampness prevails and Winter Water Qi becomes king, Water overcomes Lung Metal, causing rebellious Qi and cough. Internal attack of dampness on Zang-Fu causes cough/rebellion; external dispersion to tendons/vessels causes flaccidity.)

Injury to Cold in Winter leads to Warm Diseases (Wen Bing) in Spring. (Note: Winter injury to Cold does not immediately manifest; Cold lurks internally. By Spring, the disease emerges. Qi changes with the season, necessarily becoming a Warm Disease. The *Re Lun* [Treatise on Heat] states, "When humans are injured by Cold, they suffer from Heat," which confirms this.)

The Qi of the Four Seasons alternately injures the Five Zang Organs. (Cold, Heat, Warmth, and Coolness succeed each other in dominance. Note: The previous five paragraphs discussed weather-induced diseases; this is the summary. The Qi of the Five Zang remains balanced through mutual generation but is injured through mutual conquest. Thus, excessive Wood injures Spleen, Stagnant Fire causes Nie, Autumn Dampness self-injures, and Winter Cold transforms into Heat; this is called "alternating injury," referring to diseases caused by seasonal Qi.)

Yin Qi: Stillness allows Spirit to reside; agitation causes it to perish. Doubling food intake injures the stomach and intestines. (Note: Yin resides in the Five Zang and should be still, not active. Stillness allows the Spirits of the Five Zang to remain peaceful. If not still, Qi floats, Fire moves, and agitation occurs; Yin Qi scatters, while Yang Fire burns alone and disturbs the Stomach, leading to rapid digestion and hunger. Food intake greatly exceeds normal levels, injuring the stomach and intestines. Diet is meant to nourish Yin, yet Yin agitation leads to overeating. Excessive eating injures the stomach/intestines, and Yin Qi further diminishes. Hence, the text says: "The source of Yin lies in the Five Flavors; the Five Palaces of Yin are injured by the Five Flavors." Note: This section was originally in the *Bi Lun* chapter but is irrelevant to Bi syndrome, likely a misplaced slip. Placing it here fits the context well.)

The production of Yin originates from the Five Flavors; the Five Palaces of Yin are injured by the Five Flavors. (Yin refers to the Five Spirit-Zang. Palace refers to the residence of the Five Spirits. The Five Spirits are generated by the Five Flavors; the Five Flavors distribute and transform, reaching their respective palaces. Although generated by the Five Flavors, they are also damaged by them. This occurs when preference exceeds moderation, leading to injury. Hence the following text. Note: This chapter emphasizes Yang Qi primarily. It begins to discuss Yin and Yang equally at "Yang protects the exterior and secures, Yin stores essence and arises urgently," and returns to emphasizing Yang at "The key to Yin-Yang is Yang density securing Yin." These two paragraphs alone discuss Yin, noting that while Yin's importance isn't explicitly ranked, it warns that the Five Flavors easily injure Yin. Knowing how the Five Flavors injure Yin reveals how to nourish Yin; knowing how to nourish Yin reveals that storing essence is how to generate Qi, making vital Qi inexhaustible.)

If the flavor is overly Sour, Liver Qi becomes overflowing, and Spleen Qi perishes. (Wood controls Earth. Note: Sour enters the Liver and benefits Wood. Excessive Sour makes Liver fluid abundant and Wood vigorous. Vigorous Wood injures Earth, causing Spleen Qi to perish.)

If the flavor is overly Salty, the Qi of the large bones labors, muscles shorten, and Heart Qi is suppressed. (Salty, in excess, causes skin and muscles to contract and suppresses Heart Qi, causing stagnation. Why? Salt enters the Blood. Large bone labor occurs because Salt enters the bones.)

If the flavor is overly Sweet, the Heart suffers panting and fullness, complexion turns black, and Kidney Qi is unbalanced. (Sweet is sluggish and slow, causing panting/fullness and Kidney imbalance. Why? Earth suppresses Water. Note: Black complexion indicates Water failing to control Earth, revealing the Kidney's color externally.)

If the flavor is overly Bitter, Spleen Qi becomes dry, and Stomach Qi becomes thick/pungent. (Note: Bitter enters the Heart and supplements Fire. Excess Fire strengthens Earth. Spleen and Stomach belong to Earth. Dry Spleen Qi leads to dry intestines; thick Stomach Qi leads to rapid digestion and hunger.)

If the flavor is overly Pungent, tendons and vessels become flaccid and relaxed, and Spirit suffers disaster. (Note: The five paragraphs from "overly Sour" here discuss how the Five Flavors harm the body. Pungent enters the Lung. Excessive Pungent makes Lung Metal strong and injures the Liver. Liver injury causes tendon disease. "Ju" means knotted and unrelaxed; "Chi" means loose and unretracted. "Yang" is an error for "Ying" (disaster/misfortune). Liver injury and tendon disease bring disaster to Spirit. The commentary claims excessive Pungent prolongs spirit life, implying only Pungent benefits while Sour, Salty, Sweet, and Bitter harm. Is this logical? There are many errors in the classic; why did Wang Bing fail to notice?)

Therefore, carefully harmonize the Five Flavors. Bones will be straight, tendons flexible, Qi and Blood flowing, and interstices dense. Thus, Qi and Bone will be refined. Following the Dao and methods ensures long life and destiny. (This is what is meant by the wise who cultivate the Way of True Innate Nature.)