Second, China's dual-purpose of medicine and food actually originated from the Taoist thought of health preservation. And it is inseparable from the promotion of Sun Simiao and Ge Hong.

Third, Taoism pursues immortality and prolongs life. Pursuing intellectual lightness. They abandoned the earthly fireworks and looked for the fairy medicine from the top quality of Shennong's materia medica. In the long-term screening of generations, several drugs have become Taoist sacred products.

Fourth, the above four drugs, because they can strengthen the spleen and enhance stomach qi. It has been regarded by Taoism as a staple food that can replace human fireworks. In addition, it is recorded in ancient Chinese medicine books that Polygonatum odoratum can make white hair black, and Poria cocos can make people dehydrate and strengthen their bodies. Therefore, The Journey to the West has always used the above compatibility, which shows that Wu Cheng'en has studied both Chinese medicine and Taoism.

Chinese medicine has a history of thousands of years, and in the long-term drinking and eating process. People take its essence and discard its dross. For example, the above four kinds of Chinese medicines. Yam and barley have become daily ingredients. The other two can also enter the diet. This formula is nutritious and can strengthen the body. But there will be no effect of turning white hair into black, immortality and ascension.

The above are personal opinions and are for reference only.