In fact, thousands of years ago, there were records about Tai Sui in China's ancient book Shan Hai Jing. In Shan Hai Jing, middle age is also called "seeing meat", "gathering meat" and "meat cheese". You see, everyone has the word meat, which means edible. According to Shan Hai Jing, "seeing meat" first appeared in front of ancient tombs, and it was an item that ancient emperors liked to eat before their death. It has the characteristics of "eat it up and get it back" and "eat it piece by piece", that is to say, it can grow again after eating one piece, which seems to be the same as the "unknown creature" discovered in Zhouzhi, Shaanxi Province, and has its own growth ability. As for the idea of longevity after eating, Li Shizhen, a medical scientist in Ming Dynasty, did record it in Compendium of Materia Medica. In Compendium of Materia Medica, Li Shizhen called it the "Zhi" of the "Vegetable" Department of Rouzhi, which is also called "the top grade of this classic" with the Ganoderma lucidum we see now. Compendium of Materia Medica also lists several prescriptions focusing on "treatment", indicating that they have special curative effects on some difficult diseases, and their common characteristics are: "Long-term eating, strengthening the body and prolonging life". And because it has the characteristics of spontaneous growth, it is more precious. So emperors of all ages tried their best to find it. Among them, it is said that ancient emperors would look for Ganoderma lucidum. The most famous story is that Qin Shihuang sent Xu Fu to lead 3,000 boys and girls to find medicine.