Ganoderma lucidum is a large higher basidiomycete and a natural taxon. Ganoderma lucidum belongs to the fungi kingdom, basidiomycetes, basidiomycetes, nonpolyphaceae and Ganoderma. Ganoderma lucidum was called "Cao Rui" and "Cao Xian" in ancient times, and was regarded as an auspicious thing, because it can improve human immunity and has a good health care function. Ganoderma lucidum is not a real grass, because grass in the ordinary sense is a higher plant with chloroplasts, which can carry out photosynthesis, while Ganoderma lucidum belongs to a higher fungus and cannot carry out photosynthesis. It has been used in the medical history of China for more than 2000 years. China's oldest medical classic Shennong Herbal Classic lists Ganoderma lucidum as the first of 360 Chinese herbal medicines, ahead of ginseng. Can prevent and treat diseases, and has no side effects after long-term administration. Ganoderma lucidum is also known as "returning grass".