Only when you have enough food will you be happy. "People eat for the sky." Diet not only maintains individual life, but also relates to the continuation of race, national prosperity, social prosperity and human civilization. Shen Nong Ben Cao Jing, the first drug monograph published in China in the Han Dynasty, contains 365 kinds of drugs, among which many foods, such as jujube, lotus root, yam, Gordon Euryale seed, honey and coix seed, are listed as top-grade drugs for health care and longevity.