The "Dietotherapeutic Materia Medica" written by Meng Shen, a famous scholar, medical scientist, and dietician in the Tang Dynasty, specially collects and introduces various foods that can nourish the body and cure diseases for people to use, thus making people Get disease-treating benefits from your diet. "Dietotherapeutic Materia Medica" was written more than 1,000 years ago and is the earliest extant dietary monograph on herbal medicine in the world. Its contents are scattered in later comprehensive herbal books. A handwritten volume of the book was discovered in the Dunhuang Grottoes in Gansu Province in 1807.