一、是书之辑，专论痧疹，其痘、斑、麻、隐等证，未便涉及。惟烂喉丹痧，稍有发明，然亦略而不详。欲
求全义，自有陈耕道《疫痧草》在，故不赘述。
二、治病须明经络。若经络不明，如瞽者夜行。而三焦一经，尤为痧疹伏气第一关键。越人以降，或有形，
或无形，纷纷聚讼。余不惮琐亵，以泰西解体诸书，缕晰辨明，使数千年幽晦复明，庶几长夜一灯，不致暗中摸
索。
三、经络虽明，俞穴难考。汉唐以后，针灸失传，总缘不辨同身取寸之义，致议论分歧，语多隔膜。余折衷
诸家，畅明经旨，泄千余年失传之秘，固豆疹之津梁，实针灸之宝筏。
四、清冷渊、消泺二穴，为三焦经脉。泰西引种之说，引其命门伏毒，由经络外达。此法与牛豆同，倘能推
广行之，亦保婴之一助也。
五、选录诸家精论，当以许橡村首屈一指。其余各有奥义，读者须细心领会，勿轻看过。
六、论治虽无剩义，惟疑似同异之间，病情百变，临证之士惝恍无所适从，故选案数十条，各法略备。其间具
治病原委，览者心目豁然。遇证之偶相类者，用之无疑，效可立俟，庶免望洋之叹。
七、书分四卷。卷分八篇，曰述原，曰引种，曰预防，曰禁忌，曰辨证，曰论治，曰运气，曰选案。每有一
得之愚，附之篇末。高明之士，起而正之，匡其不逮，固鄙人之幸，亦是书之幸也。
八、古人文本，未便割裂。前后之间，难免拉杂。书虽八篇，气则一贯，读者参观互证可也。
九、是书首重畅明医理，未敢以文害义，其重复芜杂之诮，知所不免，阅者谅之。
1. The compilation of this book focuses exclusively on *shazhen* (Shazhen, a disease characterized by red maculopapular eruptions on the skin). It does not cover other conditions such as smallpox (*dou*), generalized macules (*ban*), measles (*ma*), or hidden rashes (*yin*). Only *lanhoudansha* (Lanhou Dansha, an acute infectious disease characterized by severe sore throat with ulceration and diffuse scarlet-like rash) is briefly elucidated, though still in a cursory manner. For a comprehensive understanding, one may refer to Chen Gengdao's *Yisha Cao* (Treatise on Epidemic Sha), hence no further elaboration is provided here.
2. In treating diseases, it is essential to understand the meridians. Without clarity on the meridians, one is like a blind person walking at night. Among all meridians, the Sanjiao Meridian (Triple Burner Meridian) is particularly crucial for the latent pathogenic qi (*fuqi*) associated with Shazhen. Since Bian Que (courtesy name Yuere), debates have arisen regarding whether the Sanjiao has a physical form or is formless. Not fearing triviality or impropriety, I have drawn upon Western anatomical texts to clarify these distinctions systematically, illuminating principles that had been obscure for millennia. This serves as a lamp in the long night, preventing groping in the dark.
3. Although the meridians are now clear, the acupoints remain difficult to verify. After the Han and Tang dynasties, acupuncture techniques were lost, primarily due to the failure to distinguish the concept of "tongshen cun" (Tongshen Cun, a proportional measurement method based on the patient's own body dimensions). This led to divergent opinions and communication barriers. By synthesizing various schools of thought, I have expounded upon the essence of the meridians, revealing secrets lost for over a thousand years. This work serves as a bridge for treating douzhen (Douzhen, a general term for variola and related eruptive diseases) and as a valuable vessel for learning acupuncture.
4. Qinglengyuan (TE10, Clear Cold Abyss) and Xiaoluo (TE11, Eliminating Turbidity) are acupoints belonging to the Sanjiao Meridian. The Western practice of inoculation (referring to vaccination, specifically variolation or cowpox inoculation) involves guiding the latent toxin from the Mingmen (Mingmen, Gate of Life, referring here to the source of pathogenic antigens/toxins) outward through the meridians. This method is analogous to the use of cowpox. If widely promoted and practiced, it can serve as an auxiliary means for infant protection.
5. Among the selected excerpts from various authors' profound discussions, Xu Xiangcun stands out as preeminent. Other authors also possess deep insights; readers must carefully comprehend them and not overlook them lightly.
6. Although the discussion on treatment is comprehensive, the similarity and differences between cases, along with the myriad variations in clinical presentations, often leave practitioners bewildered. Therefore, dozens of medical cases are selected, covering various therapeutic methods. These cases detail the etiology and progression of diseases, providing readers with sudden clarity. When encountering similar clinical presentations, applying these methods will yield reliable results without doubt, thereby avoiding feelings of helplessness when facing complex conditions.
7. The book is divided into four volumes, each containing eight chapters: "Elucidating Origins," "Inoculation," "Prevention," "Contraindications," "Syndrome Differentiation," "Treatment Discussion," "Physiognomy and Climate (Yunqi)," and "Selected Cases." At the end of each chapter, I append my humble insights. May scholars correct any errors and fill in gaps; this would be both my fortune and the book's good fortune.
8. Ancient texts should not be arbitrarily fragmented. There may inevitably be some redundancy between sections. Although the book consists of eight chapters, the underlying Qi (vital energy/principle) remains continuous. Readers are advised to consult and cross-reference them.
9. The primary goal of this book is to clearly elucidate medical principles. I dare not let literary style obscure meaning. I am aware that criticisms of repetition and verbosity are inevitable; I ask for the readers' understanding.