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The pulse is floating, accompanied by headache and stiffness of the neck, with fever and aversion to cold; this is an Exterior Syndrome of the Taiyang (Greater Yang) Channel. If spontaneous sweating occurs, Guizhi Tang (Cinnamon Twig Decoction) is indicated; if there is generalized body pain without sweating, Mahuang Decoction (Ephedra Decoction) is the primary treatment.

The dryness-Qi pathogenesis of the Yangming (Yang Brightness) Channel belongs to Yangming Disease. The heat in the Fu-organ and Jing-meridian diverges and requires detailed differentiation: if heat is in the Jing-meridian, use Baihu Tang (White Tiger Decoction); if heat is in the Fu-organ, use Chengqi Tang (Purgative Decoction). These conditions are not within the scope of exterior syndromes discussed here. Merely mentioning symptoms such as nasal dryness, inability to lie down, eye pain, and body heat, one may clear heat using Ge Gen (Kudzu Root).

The Ministerial Fire of Shaoyang (Lesser Yang) is primarily treated with Chai Hu (Bupleuri Radix), presenting with symptoms like bitter taste in the mouth, deafness, and tongue pain. People often say it harmonizes the Half-Exterior, Half-Interior state, but few realize its efficacy lies in turning the Pivot (Zhu). As stated in *Huangdi Neijing* (Yellow Emperor's Inner Canon): "Shaoyang serves as the pivot."

Common Cold in the Four Seasons caused by exogenous pathogens presents with symptoms identical to the Exterior Syndromes of Cold Damage, though milder. Formulas such as Jia Wei Xiang Su Yin (Modified Xiangsu Decoction) should be used to resolve the condition through slight diaphoresis (sweating), hence listed here.

Common Cold in the Four Seasons results from invasion by wandering pathogens, manifesting as alternating chills and fever, headache, and uncontrollable coughing. Using Sanjie Xiang Su Yin to induce slight sweating is appropriate; one must understand that since the disease is superficial, deep or aggressive treatment should be avoided.

Malaria is characterized by alternating chills and fever with regular periodicity, with the pathogen mainly located in the Shaoyang Channel. Shaoyang resides at the boundary of Yin and Yang, belonging to the Half-Exterior, Half-Interior category. When Yin overcomes Yang, chills occur; when Yang overcomes Yin, fever occurs. Thus, more chills than fever is called Cold Malaria; chills only without fever is called Yin Malaria (Pin Malaria); more fever than chills is called Heat Malaria; fever preceding chills, or fever only without chills, is called Dan Malaria. These are merely manifestations of Yin-Yang imbalance. Daily attacks indicate mild disease; every-other-day attacks are heavier; attacks every three to five days are particularly severe because the pathogen gradually penetrates deeper and the 'abode' of the pathogen moves further away. Initial treatment should employ Erchen Decoction (Two-Cured Decoction) and Pingwei Powder (Stomach-Pacifying Powder), doubling the dosage of Chai Hu and Sheng Jiang (Fresh Ginger) to disperse the pathogen. Intermediate stages require Xiao Chai Hu Tang (Minor Bupleuri Decoction) with Ren Shen (Ginseng) removed and Qing Pi (Citrus Aurantium Peel) added to harmonize. For rapid effect, add 3 qian of raw Chang Shan (Dichroae Radix) for vigorous expulsion. Finally, use Liujunzi Decoction (Six-Gentlemen Decoction) and Buzhong Yiqi Tang (Tonify the Middle and Augment the Qi Decoction) with Ban Xia (Pinelliae Tuber) and doubled Chai Hu to tonify. When a disease reaches its extreme, it inevitably affects the Kidney; thus, Guizhi Fuzi Wan (Cinnamon Twig and Aconite Pill) should be taken intermittently to tonify the Kidney, representing the royal method of treatment. Alternatively, use 1 liang of Dong Bai Zhu (Atractylodis Macrocephalae Rhizoma) and 5 qian of Sheng Jiang, decocted in water, taking six doses over six days, which will surely cure the disease. For severe deficiency, add 2-3 qian of Fu Zi (Prepared Aconite Lateralis Radix); for excessive heat, add 4-5 qian of Dang Gui (Angelicae Sinensis Radix). Since the pathogen comes from outside, after applying these methods, the Righteous Qi recovers, and the pathogenic Qi resolves through sweating; therefore, it is classified under Exterior Syndromes.

(Interpretation of Scripture) *Suwen: Malariology* states: "All malaria arises from wind; why do their accumulation and发作 have fixed times?" Regarding Huangdi's question and Bo's answer spanning over two thousand words, it is impossible to explain each point individually, nor is it easy to convey to those of average intelligence. From this single question, I grasped the general principle, summarized in one phrase. "Jie" means "all"; "Nue" refers to the disease that damages the body. Various symptoms of malaria are collectively termed Nue. Reading the phrase "All malaria arises from wind," and pondering the word "all," one realizes this sentence is the general outline for all types of malaria. Among the Six Exogenous Pathogens, any can cause malaria, but Wind is the leader of all diseases; speaking of Wind covers the rest. "Accumulation" refers to the pathogen accumulating in the meridians, lying dormant at times; "Occurrence" refers to the disease manifesting externally, erupting unexpectedly. It also says: "Summer injury by Summerheat leads to malaria in Autumn." *Shengqi Tongtian Lun* states: "Summer injury by Summerheat leads to malaria in Autumn." *Yinyang Yingxiang Dalun* states: "Summer injury by Summerheat leads to malaria in Autumn." *Lingshu: Lunji Zhenshi* states: "Summer injury by Summerheat leads to malaria in Autumn." *Jingui Zhenyan Lun* states: "Those who do not sweat during summer heat develop Wind-Malaria in Autumn." Synthesizing these treatises, it is undeniable that malaria is caused by Summerheat pathogen. However, "Summerheat" here should not be interpreted as Yang Summerheat, which consumes Qi and causes profuse sweating, leading to immediate onset where the pathogen cannot linger. What remains latent and unresolved is exclusively Yin Summerheat characterized by absence of sweating. Therefore, anyone suffering from malaria must have indulged in cooling off during peak summer, ignored wind and cold, bathed in cold water, swum in rivers, or consumed excessive raw/cold foods. In robust individuals, the pathogen cannot reside and fails to cause disease; in weak individuals, the pathogen lies latent in the abodes of Ying-Qi (Nutritive Qi) and Wei-Qi (Defensive Qi). When new pathogens trigger it, malaria erupts. Why is it called an "abode"? It refers to the boundaries traversed by the meridians, similar to how travelers have relay stations. This text states: this is the abode of Ying-Qi. The gist is that mentioning Wind and Summerheat indicates malaria originates from exogenous pathogens; mentioning "abode" implies the pathogen has depth and shallowness, and the abode has distance and proximity, explaining variations in onset timing (one to two days vs. four to five days). Zhang Zhongjing found this principle profound and difficult to articulate verbally, so he used the phrase "Malaria pulses are naturally wiry" to take the shortcut via the Shaoyang channel. I follow his theory, guiding those with high aptitude to begin, hoping they study *Neijing* thoroughly to gain insight.