Tang Zong-hai was written in 1884 and has eight volumes. It is Tang's monograph on hemorrhagic syndrome. The book is rich in content and clearly organized. In the book, he first explains the role of Yin-Yang Water, fire, qi, and blood in the human body, and the relationship between hemorrhagic syndrome and zang-fu organ; secondly, he explains the role of hemorrhagic syndrome in the human body. The diseases are classified into categories, and the methods of diagnosis and treatment are described in detail. Specific prescriptions are also listed under each disease syndrome, which can be said to be analyzed step by step, and the treatment is detailed. The biggest feature of this book is its strong practicality. Because he read all the prescriptions and practiced it personally in the study of hemorrhagic syndrome, most of what is discussed in the book is based on experience. As he said in the preface: "Yuan will discover the subtle secrets of the loss of blood one by one, either extending what the ancients wanted to say, or making up for what the predecessors did not prepare. We must ensure that the theory is sufficient to be effective, and we will not be influenced by the talk." It can be seen from this that the book Xiezheng Lun was written based on summarizing the experience and theory of predecessors and combined with my own practical experience. Therefore, this book not only has guiding significance for the treatment of hemorrhagic syndrome, but also It is also an important reference for studying hemorrhagic syndrome.