"Medical Insights" is a medical work compiled by Tang Zonghai (Rongchuan), a famous doctor in Sichuan, and was published in 1873. This work introduces the physiological organs, the body functions of meridians and the outline of the four diagnostic methods in a concise and clear way, and summarizes many syndrome and treatment methods, so that readers can easily master the method of syndrome differentiation and treatment and avoid feeling at a loss when facing diseases.