The record says: The doctor is not three generations old, and he does not take his medicine.Zheng Kangcheng said: Be careful and keep everything in order.Kong Chongyuan quoted the old saying: "Three generations, one is Huangdi Acupuncture, the other is Shennong's Materia Medica, and the third is Su Nu Mai Jue."Kangcheng Zhou Li Annotation, also said: Five medicines, grass, wood, insects, stones, and grains.The uniformity of its governance and combination lies in the art of Shennong Ziyi. It is the so-called carefulness of things in the Annotation of the Book of Rites.Chongyuan quoted the old theory, but doubted that it was not Zheng Yi's exaggeration.The Hanshu cited Materia Medica alchemy, but the Yiwenzhi lacked it. Jia Gongyan cited the Chinese classics, and there is a volume of Ziyi’s Materia Medica, which does not say that it came from Shennong.In Sui Jing Ji Zhi, there were three volumes of Shennong’s Materia Medica, which coincided with the current classification of the upper, middle and lower grades, and should belong to the old editions since the Han Dynasty.Sui Zhi also contained four volumes of Lei Gong's Materia Medica Anthology and Notes, and Cai Yong's Materia Medica in seven volumes, none of which are published today.Since the Bielu, there has been a rise and fall of profit and loss, notes at any time, or passing on the text, it is not different. According to Lu Yuen Long's classic commentary, the scriptures and those attached to the famous doctor are combined into one, which is old.Sun Junboyuan and his disciple Yin Daguan Materia Medica black and white script, corrected the three volumes of Shennong Benjing, and according to Taiping Yulan’s quotations, the one that grows valleys and rivers is designated as this article. It has pre-chapters, Zhuya, Changshan , Feng Gao, the name of the prefecture and county, is determined to be entered by future generations.Among the interpreters of Materia Medica, Wu Pu's is the oldest.Scattered in the quotations of various books, it is not easy to collect them to supplement the unpreparedness of Daguan, to clarify the ancient meanings, and to textual research. They are not elegant talents and depressed thoughts.The ancients cooperated with the harmony of yin and yang, declared the festival of winning and shrinking, ordinary people held their voices and breaths, and reversed life, and the relationship between flying and wriggling, Xu made the best of his nature, and when he met things, he could name them to achieve the use of living things. Confucianists It is advisable to think about it.

Huainan Wang Shu said: Rehmannia glutinosa mainly belongs to bones, while licorice mainly belongs to the medicine of raw meat.It is also said that when the eucalyptus is removed from the water, the tingli will become more open, and if it is not used sparingly, it will become a disease instead.Lunheng said: use wind to treat wind, use heat to treat heat, and use honey pill to treat side effects; Qianfu said: treat diseases with ginseng, but instead of Zhiluofu, you should use Ophiopogon japonicus, and steam Hengmai instead. Knowing the truth, taking it together, and treating illness with drama, these are all the prefaces of Shennong, but those who support them are rich, so they quote analogies and learn to follow the theory of medicine. It is the last teacher, not the ancient ones, and even the birds, beasts, plants and trees in the classics have been passed around without knowing their names, so be careful!In the biography of Hua Tuo in the later Han Dynasty, Wu Pu learned from Tuo, relied on Zhun Tuo's treatment, and helped him in many places. According to legend, there are no strange words and numbers.Today, the explanations of Materia Medica in Guanpu include Shennong, Huangdi, Qibo, Leigong, Tongjun, Yihe, Bian Que, and the famous doctors of later generations. The secret is not necessarily unique and unique, believe it!Those who have not read the books of the third generation should not take their medicine.Most of the books of the Yellow Emperor, Shennong, and Bian Que handed down by the world were changed by later generations.Because Sun Junbo Zhong corrected the Materia Medica, and published its origin, until the textual research and intensive review of his book, readers should be content with it.Preface by Yuyao Shaojinhan.