Tang materia medica issued by the Tang government is also called Tang Xinxiu materia medica, and sometimes it is also called the newly revised materia medica. The newly revised materia medica originally refers to three parts of literature, namely, materia medica, drug map and map classics. According to most documents, there are 54 volumes in the above three parts; Materia Medica (20 volumes), Catalogue of Materia Medica 1 volume, Medicinal Map (25 volumes), Catalogue of Medicinal Map 1 volume and Illustration (7 volumes). Materia Medica talks about the nature, taste, source, processing, function and indications of drugs, while Herbal Map is a descriptive text for herbal maps. Doi Jing and Yao Tu have long been lost, so they can't pass the exam. Only this part of the materia medica, although no longer circulated after the Song Dynasty, is only a fragmentary version now, but most of its contents remain in the later Materia Medica, which is still valued by people, so what we are talking about now is simply this part of the materia medica.
The newly revised Materia Medica collected 850 kinds of drugs, which was 1 14 more than the Notes on Materia Medica. The nature, taste, source, collection, function and indications of each medicine were introduced in detail. There is some innovation in compiling genre. In order to correctly identify the collection and use of drugs, in addition to the traditional materia medica, a detailed "Drug Map" was creatively drawn and illustrated with "illustrations", accounting for about two-thirds of the book's length.
After the publication of Newly Revised Materia Medica, it has been widely used in China for more than 300 years, and then spread to the east of China, with far-reaching influence.