Answer: It was 1500 Jin Dynasty, which was handed down from ancient times. It belongs to the category of external treatment of internal diseases in traditional Chinese medicine, which can be traced back to the Jin Dynasty 1500 years ago. Ge Hong, a pharmacologist at that time, wrote China's first clinical first aid manual "Elbow Backup Emergency Prescription", which has been used to record external treatment. More than 400 years ago in the Ming Dynasty, Li Shizhen, a medical scientist, recorded more than a dozen external treatments such as sticking, painting, rubbing and applying in Compendium of Materia Medica.
Therefore, Chinese medicine targeted drug penetration therapy is an improved therapy based on the principle of Chinese medicine, and it is a green therapy combining modern electronic technology with tradition.
The principle of external treatment is the principle of internal treatment, and the medicine for external treatment is the medicine for internal treatment.
Explanation: Both external treatment and internal treatment are guided by the theory of traditional Chinese medicine, and the only difference is the way of administration.