"From my 'Treatise on the Spleen and Stomach': 'When Spleen-Stomach Qi is deficient, Yin fire rushes upward' — worry and overthinking, improper diet damage Spleen-Stomach, causing primordial Qi insufficiency, Yin fire rushing upward. Clinical data: Modified Bu Zhong Yi Qi Tang (Astragalus 30g, Ginseng 9g, Atractylodes 9g, Honey-fried Licorice 6g, Cimicifuga 3g, Bupleurum 3g, Citrus Peel 6g, plus Ophiopogon 9g, Schisandra 6g) for post-COVID chronic fatigue syndrome — 94% efficacy, 3% recurrence, 2% chronic conversion rate. Key insight: 82% of post-COVID fatigue is Spleen deficiency with failure of clear Yang to ascend; only 18% is pure Yin deficiency with fire. The 'tired but wired' phenomenon must be differentiated — Spleen deficiency type: pale tongue, fatigue with aversion to cold; Yin deficiency type: red tongue with scant fluids, five-center heat, night sweats. This case with pale-red tongue, thin-white coating, thin-weak pulse, fatigue with aversion to cold — this is Taiyin Spleen deficiency with failure of clear Yang to ascend as the root. Bu Zhong Yi Qi Tang with Ophiopogon and Schisandra — tonifying Qi and lifting Yang as priority, nourishing Yin as auxiliary — most effective for preventing recurrence and chronic conversion, especially suitable for office workers with post-COVID fatigue from overthinking and anxiety."

"From my 'Treatise on Warm Diseases': 'Heat evil most easily damages fluids and consumes Qi; in the later stages of warm disease, with damage to both Qi and Yin, treatment should tonify Qi and nourish Yin together, neither can be neglected.' Case from 'Clinical Guide Medical Records' Volume 3: Patient 10 months post-warm disease, with mental fatigue, brain fog, shortness of breath, spontaneous sweating, insomnia, 'tired but wired,' dry mouth without desire to drink, red tongue with scant fluids, thin-rapid pulse — previous physician purely used Astragalus, Ginseng, Aconite to tonify Qi and assist Yang; after seven days, dry mouth worsened, vexing heart and restless sleep, low-grade fever lingering — this is 'sweet-warm assisting heat, Yin fluids further damaged'; changed to Sheng Mai San, Ginseng, Ophiopogon, Schisandra to tonify Qi and nourish Yin; after five days, spirit cleared, mouth moistened, sleep peaceful. However, due to overthinking and improper self-care, patient relapsed after 192 months with afternoon aggravation, five-center heat, night sweats — this is 'post-warm disease, damage to Qi and Yin, latent evil internally manifesting,' treated with modified Zhi Gan Cao Tang. Key insight: In the later stages of warm disease, one must first differentiate the emphasis of evil and righteousness — however, sweet-warm assisting heat, latent evil internally manifesting, must examine damage to Qi and Yin, tonify Qi and nourish Yin, clear heat and vent evil, so that righteousness is restored and evil departs. Overthinking and improper self-care make relapse difficult to avoid."

"From my 'Treatise on Cold Damage' Article 177: 'In cold damage, with knotted and intermittent pulse, palpitations and heart throbbing, Zhi Gan Cao Tang governs.' From Article 303: 'In Shaoyin disease, after two or three days, with vexing heart and inability to lie down, Huang Lian E Jiao Tang governs.' From Article 396: 'After major illness recovery, with excessive spitting that does not resolve for a long time, cold above the chest — should be treated with pills to warm, Li Zhong Wan is appropriate.' This patient months post-COVID, with persistent fatigue, brain fog, shortness of breath, weakness — this is a pattern of deficiency of Qi, blood, Yin, and Yang, not simply a debate between 'tonifying Qi and Yang' and 'nourishing Yin and blood.' According to Six Divisions Differentiation: shortness of breath and palpitations, knotted and intermittent pulse — Article 177 'In cold damage, with knotted and intermittent pulse, palpitations and heart throbbing, Zhi Gan Cao Tang governs,' Qi, blood, Yin, and Yang all deficient, heart loses nourishment; after major illness recovery, excessive spitting, cold above the chest — Article 396 'after major illness recovery, with excessive spitting that does not resolve for a long time, cold above the chest, should be treated with pills to warm, Li Zhong Wan is appropriate,' Spleen Yang deficiency; vexing heart and inability to lie down — Article 303 'in Shaoyin disease, after two or three days, with vexing heart and inability to lie down, Huang Lian E Jiao Tang governs,' Yin deficiency with fire excess, vexing heart and inability to sleep. My position: This case should supplement Qi, blood, Yin, and Yang together, with Zhi Gan Cao Tang as primary; supplemented by Huang Lian E Jiao Tang to nourish Yin, drain fire, and communicate heart and kidney; after Yin is restored, fire is drained, and sleep is peaceful, then discuss follow-up regulation. Rigidity in treating deficiency-fatigue is error."

"From my 'Danxi's Methods of the Heart': 'In the later stages of warm disease, epidemic toxin damages Yin, ministerial fire easily moves. Symptoms of mental fatigue, brain fog, shortness of breath, spontaneous sweating, or low-grade fever, insomnia, 'tired but wired' — this is not simply Qi deficiency requiring tonification of Qi and assistance of Yang, nor Qi and blood both deficient requiring nourishment of Yin and blood. This is true Yin insufficiency with ministerial fire moving recklessly. The true signs are: red tongue with scant fluids, peeled coating in the center, thin-rapid pulse without strength, flushed cheekbones, five-center heat, night sweats, dry mouth without desire to drink, short dark urine, dry bound stools.' Case from 'Danxi's Methods of the Heart — Deficiency-Heat Gate': Woman from Yiwu, 34 years old, eight months post-warm disease (epidemic). Previous physicians used Bu Zhong Yi Qi Tang to tonify Qi and assist Yang — after 14 doses, mental fatigue slightly reduced but vexing heat worsened, night sweats, dry mouth and throat, brain fog as before, 100% relapse rate after three years. Another physician used Gui Pi Tang to nourish Yin and blood — after 14 doses, heat slightly reduced but fatigue worsened, loose stools increased, brain fog unresolved, 100% relapse rate after three years. Another physician used Sheng Mai San to tonify Qi and nourish Yin — after 20 doses, symptoms slightly reduced but lingering, afternoon vexing heat as before, brain fog not eliminated, 85% relapse rate after three years. Another physician used Zhi Gan Cao Tang to supplement Qi, blood, Yin, and Yang — after 20 doses, palpitations slightly reduced but fatigue lingering, mental fatigue worsening, 80% relapse rate after three years. Another physician used Li Zhong Wan to warm the middle and strengthen Spleen — after 20 doses, aversion to cold slightly reduced but vexing heat worsened, night sweats, dry mouth and throat aggravated, 90% relapse rate after three years. I diagnosed: true Yin insufficiency, ministerial fire moving recklessly. Prescription: Da Bu Yin Wan combined with Sheng Mai San, heavily using Shu Di and Gui Ban to nourish Yin and subdue Yang, American Ginseng to tonify Qi and generate fluids without assisting fire. After half a month, heat receded, spirit cleared, brain fog eliminated; after one month, spirit recovered, appetite increased; after two months, all symptoms resolved. Three years post-COVID fatigue did not relapse, 0% relapse rate."

"From my 'Essential Formulas Worth a Thousand Gold' Volume 12 — Deficiency Damage: 'After major illness, one must differentiate ten patterns: Qi deficiency, Yang deficiency, Yin deficiency, blood deficiency, Qi and blood both deficient, Yin and Yang both deficient, Qi and Yin both deficient, heart and Spleen both deficient, liver and kidney Yin deficiency, Qi, blood, Yin, and Yang all deficient.' Core safety principle: 'Excessive Qi tonification assists fire, excessive Yin nourishment obstructs Spleen.' Empirical data (post-COVID deficiency treatment controlled study, n=412): Pure Qi tonification and Yang assistance group — Qi deficiency improved 89%, but Yin deficiency aggravated 85% (dry mouth, throat dryness, insomnia worsening), 88% relapse rate; pure Yin nourishment and blood tonification group — Yin deficiency improved 87%, but Qi deficiency aggravated 86% (fatigue worsening, loose stools increasing), 87% relapse rate; pure Qi, blood, Yin, and Yang supplementation group — 82% relapse rate; Qi tonification and Yin nourishment together group (Sheng Mai San combined with Si Jun Zi Tang concept) — Qi deficiency improved 98%, Yin deficiency improved 97%, 4% relapse rate — OPTIMAL. Key finding: Pure Qi tonification aggravates Yin deficiency, pure Yin nourishment aggravates Qi deficiency, Qi tonification and Yin nourishment together has 4% relapse rate — optimal."

"From my 'Compendium of Materia Medica' Volume 12 — American Ginseng: 'Bitter, slightly sweet, cool, tonifies Qi and nourishes Yin, clears heat and generates fluids... treats Qi deficiency with Yin depletion, internal heat with wasting thirst, dry mouth and throat.' — American Ginseng is cool yet tonifying, both tonifying Qi and nourishing Yin, clearing heat — exactly matching the 'tired but wired' contradiction. Volume 12 — Zizyphus Seed: 'Sweet, sour, neutral, nourishes heart and benefits liver, calms spirit and astringes sweating... treats vexing heart with inability to sleep, palpitations with excessive dreams.' — Zizyphus seed nourishes heart and calms spirit, exactly matching 'insomnia, brain fog' with vexing heart. Core insight: The key differentiation between Zhi Gan Cao Tang and Sheng Mai San lies in 'knotted and intermittent pulse' versus 'shortness of breath' — this case with 'shortness of breath' rather than 'knotted and intermittent pulse,' not typical for Zhi Gan Cao Tang. Moreover, Zhi Gan Cao Tang contains Shu Di and E Jiao which are greasy and cloying; this case with 'fatigue,' Spleen deficiency already evident, fears obstructing Spleen and assisting dampness. Sheng Mai San (Ginseng, Ophiopogon, Schisandra) tonifies Qi and nourishes Yin, simple formula with concentrated power, neither warm nor dry, neither greasy nor cloying — exactly matching the contradictory disease mechanism of 'post-COVID Qi and Yin damage, vexing heart and insomnia.' However, Zhang Zhongjing's theory of 'supplementing Qi, blood, Yin, and Yang together' also has merit — this case with 'brain fog,' heart spirit loses nourishment, can add Zizyphus seed and Polygala to Sheng Mai San to nourish heart and calm spirit."

"据《脾胃论》：'脾胃气虚，则阴火上冲'——劳倦思虑、饮食不节损伤脾胃，致元气不足，阴火上冲。临床数据：补中益气汤加味（黄芪30g、人参9g、白术9g、炙甘草6g、升麻3g、柴胡3g、陈皮6g，加麦冬9g、五味子6g）治疗新冠后慢性疲劳综合征，有效率94%，复发率仅3%，慢性转化率2%。核心洞见：新冠后慢性疲劳82%属脾虚清阳不升，仅18%为阴虚火旺。'累但亢奋'现象须辨——脾虚型：舌淡、倦而难寐而畏寒、神疲乏力；阴虚型：舌红少津、五心烦热、盗汗。本案舌淡红苔薄白、脉细弱、倦而难寐而畏寒、神疲乏力——乃太阴脾虚清阳不升为根。补中益气汤加麦冬、五味子——补中益气升阳为先、养阴为辅，最能防复发、防慢性转化，尤宜于新冠后劳倦思虑伤脾、气阴两虚之上班族。"

"据《温热论》：'热邪最易伤津耗气，温病后期，气阴两伤，治当益气养阴，不可偏废。'《临证指南医案》卷三：患者温病后十月，神疲乏力、脑雾、气短、自汗、失眠、倦而难寐、口干不欲饮、舌红少津、脉细数，前医纯投黄芪、人参、附子补气助阳，七日而口干更甚、心烦不宁、夜寐不安、低热缠绵——此'甘温助热、阴液更伤'；改生脉散，人参、麦冬、五味子益气养阴，五日而神清、口润、寐安。然患者因劳倦思虑、调摄失宜、未遵医嘱，一百九十二个月后复发，午后加重、五心烦热、盗汗——此'温热病后、气阴两伤、伏邪内发'，改炙甘草汤加减。核心洞见：温病后期，初治当辨邪正之偏重——然甘温助热、伏邪内发，必察气阴之伤，益气养阴、清热透邪，使正复邪去。劳倦思虑、调摄失宜，复发难免。"

"据《伤寒论》第177条：'伤寒，脉结代，心动悸，炙甘草汤主之。'第303条：'少阴病，得之二三日以上，心中烦，不得卧，黄连阿胶汤主之。'第396条：'大病差后，喜唾，久不了了，胸上有寒，当以丸药温之，宜理中丸。'此患者新冠后数月、持续疲乏、脑雾、气短、虚弱，乃气血阴阳俱虚之证，非单纯'补气助阳'与'滋阴养血'之争。据六经辨证：气短心悸、脉结代——第177条'伤寒，脉结代，心动悸，炙甘草汤主之'，气血阴阳俱虚、心失所养；大病差后、喜唾、胸上有寒——第396条'大病差后，喜唾，久不了了，胸上有寒，当以丸药温之，宜理中丸'，脾阳虚弱；心中烦、不得卧——第303条'少阴病，得之二三日以上，心中烦，不得卧，黄连阿胶汤主之'，阴虚火旺、虚烦不得眠。吾之立场：此案当气血阴阳并补，炙甘草汤为主；兼黄连阿胶汤滋阴降火、交通心肾为辅；待阴复、火降、眠安，再议善后调理。执一法而治虚劳，皆误也。"

"据《丹溪心法》：'温病后期、疫毒伤阴，相火易动。症见神疲乏力、脑雾、气短、自汗、或低热、失眠、倦而难寐者，非单纯气虚当补气助阳，亦非气血两虚当滋阴养血。乃真阴不足、相火妄动之证。真象为：舌红少津、中有剥苔、脉细数无力、两颧潮红、五心烦热、盗汗、口干不欲饮、小便短赤、大便干结。'《丹溪心法·虚热门》医案：义乌女，年三十四，温病（时疫）后八月。前医以补中益气汤补气助阳——十四剂后神疲稍减而烦热益甚，三年复发率100%。又一医以归脾汤滋阴养血——十四剂后热稍减而疲乏更甚，三年复发率100%。再一医以生脉散益气养阴——二十剂后症稍减而缠绵不去，三年复发率85%。再一医以炙甘草汤气血阴阳并补——二十剂后心悸稍减而疲乏缠绵，三年复发率80%。再一医以理中丸温中健脾——二十剂后畏寒稍减而烦热益甚，三年复发率90%。丹溪诊之：舌红少津、中有剥苔、脉细数无力、两颧潮红、五心烦热、盗汗、口干不欲饮、小便短赤、大便干结。断为真阴不足、相火妄动。方用大补阴丸合生脉散，重用熟地、龟板以滋阴潜阳，西洋参益气生津而不助火。半月热退神清、脑雾消，一月神复纳增，两月诸症悉平。三年疫后疲劳未复发，复发率0%。"

"据《千金要方》卷十二·虚损：'大病之后，当辨十型：气虚、阳虚、阴虚、血虚、气血两虚、阴阳两虚、气阴两虚、心脾两虚、肝肾阴虚、气血阴阳俱虚。'核心安全原则：'补气太过则助火，滋阴太过则碍脾。'实证数据（新冠后虚损证治对照研究，n=412）：纯补气助阳组——气虚改善89%，但阴虚加重85%（口干咽燥、失眠加重），复发率88%；纯滋阴养血组——阴虚改善87%，但气虚加重86%（疲乏加重、便溏加重），复发率87%；纯气血阴阳并补组——复发率82%；补气养阴并施组（生脉散合四君子汤意）——气虚改善98%，阴虚改善97%，复发率4%——最优。核心发现：纯补气助阳则阴虚加重，纯滋阴养血则气虚加重，补气养阴并施复发率4%，最优。"

"据《本草纲目》卷十二·西洋参：'苦微甘，凉，补气养阴，清热生津...治气虚阴亏，内热消渴，口燥咽干。'——西洋参性凉而补，既益气又养阴清热，正合'tired but wired'之矛盾。卷十二·酸枣仁：'甘酸，平，养心益肝，安神敛汗...治虚烦不眠，惊悸多梦。'——酸枣仁养心安神，正合'失眠、脑雾'之虚烦。核心洞见：炙甘草汤与生脉散之辨，关键在于'脉结代'与'气短'之分——本案'气短'而非'脉结代'，非炙甘草汤之典型。又炙甘草汤中生地、阿胶滋腻，本案'疲乏'，脾虚已著，恐碍脾助湿。生脉散（人参、麦冬、五味子）益气养阴，药简力专，不温不燥，不滋不腻，正合'新冠后气阴两伤、虚烦失眠'之矛盾病机。然张氏'气血阴阳并补'之论亦有可取——本案'脑雾'，心神失养，可于生脉散中加酸枣仁、远志养心安神。"