Dendrobium is listed as “the first of the nine Chinese immortal herbs” in the medical classic “Daozang” of Tang Dynasty, and has been listed as the royal tribute since Tang and Song Dynasty. Dendrobium is mostly distributed on the mountain, semi-shady and wet rocks and large tree trunks at an altitude of up to 1,000 meters, with a suitable growth temperature of 15℃~28℃ and air humidity above 80%, and likes warm and humid climate and semi-shady and semi-sunny environment. Because of the small photosynthetic area of Dendrobium, the growth cycle is slow and it is extremely difficult to survive, coupled with over-harvesting, wild Dendrobium is on the verge of extinction. In the 1980s, Dendrobium ironbark was listed by the state as a key protected cherished and endangered medicinal plant. The young stems of Dendrobium ironbark and other few species are twisted into spiral or spring shape, dried, and called Dendrobium ironbark. Dendrobium is a perennial epiphytic herb that sprouts new shoots every spring, and the length can generally grow to more than 30cm. Harvesting starts in winter, and from frost to cold, the active ingredients with medicinal value in the fresh strips of Dendrobium will be more and more, and the juice will be thick and sticky when eaten. After the flowering in May, if it is not harvested, the active ingredients with medicinal value will continue to decline, and the taste will become more and more watery and light. “Born in nature, precious in quality”. Our Tiansheng Yuan Dendrobium grows in the high mountains of Lishui, Zhejiang Province, the geography, climate, temperature difference, water quality, sunlight, etc. provide the most suitable ecological environment for Dendrobium, the planting mode adopts organic planting without pesticides and pollution, the seed source adopts the local wild Dendrobium preferably in Lishui, according to the authoritative department repeatedly test, its active ingredients Dendrobium polysaccharide are more than 60%. The good quality Dendrobium adopts the method of taking fresh products and fresh food, which can absorb the active ingredients of Dendrobium to the maximum, and the quality of Dendrobium can be distinguished from the appearance and taste alone, and consumers can avoid the risk of being deceived.