Dendrobium (scientific name: Dendrobium? nobile？ Lindl), also known as Wan Zhangxu, Chlorophytum, Lin Lan, Jin Chaihua, etc. The stem is erect, fleshy, slightly oblate and cylindrical, with a length of 10~60 cm and a thickness of 1.3 cm. Medicinal plants are sweet and slightly salty, cold in nature, and enter the stomach, kidney and lung meridians. Benefiting stomach, promoting fluid production, nourishing yin and clearing heat. Used for yin injury, body fluid deficiency, dry mouth, polydipsia, retching, asthenic heat after illness, and blurred vision. Dendrobium is known as one of the "four ornamental flowers" because of its elegant appearance, exquisite and lovely appearance, bright color and fragrant smell.