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The oldest medical classic is the *Neijing* (Huangdi Neijing, Yellow Emperor's Inner Canon), thus the ancestors of medicine are considered to be Qibo and Huangdi. However, the *Bencao* (Materia Medica) originated with Shennong, which predates Huangdi. This indicates that the origin of medicine lies in herbs. It was during the time of Huangdi that the principles of meridians and zang-fu organs, the distinctions between internal injuries and external infections, and the formulations of formulas—specifically the roles of sovereign, minister, assistant, and courier herbs, as well as the systems of large and small formulas, odd and even formulas—were expounded, thereby illuminating the rationale of herbal usage. Medicine became greatly comprehensive from this point onward. Nevertheless, the *Neijing* focuses primarily on the morphology of human zang-fu organs, the influences of the seven emotions and six climatic factors, and includes many miscellaneous methods such as acupuncture and moxibustion, with few prescriptions. Later, Yi Yin invented the method of treating diseases with decoctions, but this was derived from hearsay without extant texts for verification. It was not until Bian Que and Cang Gong appeared that the use of herbal decoctions gradually expanded. When Mr. Zhang Zhongjing emerged, he specialized in treating miscellaneous diseases and cold damage disorders using prescriptions, thereby becoming the ancestral figure for prescription usage through the ages. His prescriptions were all based on the profound essence of Shennong and Huangdi, compiling previously transmitted formulas; Zhang Zhongjing merely gathered their achievements. Since then, physicians have placed heavy emphasis on prescriptions, often neglecting to investigate the principles of heaven and earth, yin and yang, meridians, and zang-fu organs, as well as acupuncture and other techniques. The methods of treating disease underwent a significant shift from this point. After the Tang and Song dynasties, this trend continued to intensify. In the Yuan dynasty, figures such as Liu Hejian and Zhang Jiegu appeared; they did not fail to value the study of the *Neijing*. In discussing diseases, they would first cite the canonical text, then adopt theories from various schools, and finally attach treatment methods, seemingly grasping the true intent. However, these individuals were not Confucian scholars with broad learning, unable to deeply comprehend the meaning of the classics. Furthermore, they failed to thoroughly investigate the origins of Zhang Zhongjing’s prescription logic. Consequently, their theories were either superficial or fragmented, each adhering to bias rather than returning to the mean. The most biased and flawed among them was Li Dongyuan, who focused solely on warming and drying the spleen and stomach, and his prescriptions lacked any systematic rules. Because there was no genuine scholarship at the time, only empty reputations were stolen, so his teachings have persisted to this day. By the Ming dynasty, Xue Lizhai was even more superficial and absurd, akin to transforming the learning of sages into corrupt eight-legged essays, yet claiming to study ancient classics. If applied to governing the world, could it truly match the eras of Tang Yao, Yu Shun, and the Three Dynasties? Since they did not understand the profound essence of Shennong and Huangdi, the properties of herbs and the sources of zang-fu and meridians remained unclear. Since they did not know the rules of Zhang Zhongjing’s prescription formulation, the changes in disease and the methods of treatment were not carefully examined. They simply stated: "For a certain disease, use a certain formula; if ineffective, switch to another." Even worse, some patients took a single formula for twenty or thirty doses, allowing the illness to drag on until it healed spontaneously. With no firm grasp in mind, they prioritized simplicity. From this point forward, the detrimental effects worsened daily, resulting in countless unjust deaths. Where would those who studied the *Bencao*, exhausted the *Neijing*, and mastered the *Jingui Yaolue* (Essential Prescriptions from the Golden Cabinet) and *Shanghan Lun* (Treatise on Cold Damage Disorders) come from to remedy these abuses and protect people's lives? The root of this harm lies in the fact that those who learned medicine were often poor, uneducated individuals who pursued it solely for food and clothing. Thus, they memorized only a few formulas and used them to treat all diseases under heaven, never seeking other methods, leading to such disastrous consequences.