There are many hills and basins in Zheng'an, and there are widely distributed acid yellow soil suitable for white and growth. The soil layer is deep, fertile, loose, moist, and lush vegetation, suitable for white and planting. Zhengan white and high quality, fresh products are not easy to break, the cross section is translucent horny, and there are scattered vascular bundle points. The air is slight, the taste is light and bitter, and it is mucoid. The rhizome is thick, white and bright, and a large solid. The dry tubers are slightly palm-shaped and flat, with 2 to 3 divergence, 1.5 to 4.5 cm in length and 0.5 cm in thickness. The surface is yellowish white with fine wrinkles and raised stem marks on the top. There are also traces connecting the other stems. The stem marks are centered on the center of the stem, surrounded by a brown concentric ring with fine root marks. Zhenganbaihe is one of the key Chinese herbal medicines developed in Guizhou Province. It is also the Chinese herbal medicine industry supported and supported by the Zhengan County Government. It has been supported by several national projects.

Zhenganbai and its production in Zheng'an County, Zunyi City, Guizhou Province, Baihe and Li Shizhen's "Compendium of Materia Medica" in the Ming Dynasty: "The roots are white, even born, hence the name white and" named, is an authentic medicine. Baihe is a white medicinal plant of Orchidaceae and is a medicinal plant of Zhengan County. "Continued Anzhou" records that the domestic production of Magnolia ... white peony, white peony and other Chinese medicinal materials; 椐 "Zheng'an County Health Journal" 288 pages record: "My county's Chinese herbal medicine resources have ... white 芨 and so on."椐《Zheng'an County Health Journal》, pp. 292-305 records: "Since the ancient times, the Zhengan people have accumulated a wealth of treatment and treatment unilateral and prescription in the process of fighting disease, and passed down from generation to generation." Among the many unilateral, it involves the treatment of enteritis, 12 intestinal ulcers and treatment of external hemorrhage and hemostasis. Among the many prescriptions, it involves the treatment of influenza, treatment of tuberculosis and treatment of traumatic bleeding. These records fully demonstrate that the people of Zhengan County have used local wild white and treatment-related diseases for a long time. Reproduction and cultivation (1) Reproduction Commonly used to breed. Before the spring new leaves are germinated or the upper part of the autumn and winter is withered, the old plants are excavated and the pseudobulbs are divided for planting. Each plant can be divided into 3-5 strains, and each plant must have a top bud. It can also be used for sowing and breeding. However, due to the small size of the seeds and the incomplete development, it is necessary to inoculate the medium in a sterile manner. The operation is complicated and it is rarely used. (2) Cultivation Before the planting, the soil is ploughed and the base fertilizer is applied. Planted at the beginning of March, planting depth of 3cm. During the growing period, the soil should be kept moist, pay attention to the weeding and loosening soil, and fertilize once every 2 weeks. It usually blooms 2 months after planting. Applying phosphate fertilizer once after flowering to mid-August can enrich the roots. (3) Pests and diseases Black spot disease often occurs, and is sprayed with 70% methyl thiophanate wet powder 1000 times. Sometimes there is a root knot nematode disease, and the potting soil is applied with 3% carbofuran granules. Medicinal value Category: Activating blood and removing stasis medicine Harvesting and processing: excavation in summer and autumn, remove residual stems and fibrous roots, wash, boil and boil until no white heart, remove the outer skin, dry and slice for raw use. Sexual taste is back [3]: bitter, sweet, sputum, slightly cold. Return to the lungs, liver, stomach. Indications: convergence to stop bleeding, swelling and muscle. For hemoptysis and vomiting blood, traumatic bleeding, sore swollen, skin chapped; tuberculosis hemoptysis, ulcer disease bleeding. Dosage: 6 ~ 15g, powdered and swallowed 3 ~ 6g. Appropriate amount for external use. Should not be used with aconite herbs. [Sexual taste returning] taste bitter, sweet, sputum, cold, return to the lungs, stomach. Liver. It has the effect of astringent hemostasis, swelling and muscle growth, and is used for internal and external bleeding syndromes and carbuncles, burns, cleft palate, anal fissure and so on. [Picking] Excavation in summer and autumn, remove residual stems and fibrous roots, wash, boil and boil until no white heart, remove the outer skin, dry, slice and use. [Pharmacopoeia Basis] "Shen Nong's Herbal Classic": "The main carbuncles, malignant sores, defeated, injured Yin dead muscles, evil in the stomach" "Compendium of Materia Medica": "Smell (root) bitter, flat, non-toxic".

Zhenganbai and quality technical requirements First, the source of white and (Bletilla striata (Thunb.) Reichb.f.). Second, the site conditions of the mountain range and hilly area of ​​600m to 1800m above sea level, the soil type is soil loose, moist silt soil, yellow loam soil, organic matter content ≥1%, soil pH average 5.0 to 7.5. Third, cultivation techniques Breeding method: tuber reproduction. From September to October, the harvest was timely, and the seedlings with bulbs and buds were selected as the seedlings. 2. When the first weeding occurred in the seedlings, the second weeding was in the white and vigorous growth period, and the third weeding was in early June. 3. Fertilization: Each 667m2 (mu) of fertilized organic fertilizer is more than 2000kg per year. 4. Management of seedlings: flower buds are removed during flower buds. 5. Environmental and safety requirements: The use of pesticides, fertilizers, etc. must comply with relevant national regulations and must not pollute the environment. Fourth, harvest processing 1. Harvesting time: Mining from September to October after planting for 2 years. 2. 3. Processing method: Take out the harvested white and take it out when there is no white heart. When drying or rubbing until the surface is dry and hard, the residue is removed, the surface is smooth and pale yellow, the impurities are removed by sieve, and the inferior product is picked out. V. Quality characteristics 1. Sensory characteristics: qi, light and slightly bitter, chewy sticky. The cross section is translucent and horny. The dried tubers are slightly palm-shaped, with a yellow-white surface and fine wrinkles. There are raised stem marks on the top, with the stem marks as the center and a tan concentric ring. Hard and not easy to break. 2. 3. Safety and other quality technical requirements: Product safety and other quality technical requirements must comply with relevant national regulations.

Apply to：
The producers in Zhenganbai and the production area may submit an application to the Quality and Technical Supervision Bureau of Zheng'an County of Guizhou Province for the use of the “Special Mark for Geographical Indication Products”, which shall be reviewed by the Guizhou Provincial Bureau of Quality and Technical Supervision and announced to the General Administration of Quality Supervision, Inspection and Quarantine for approval. Zhengan Baihe's testing organization is selected by the Guizhou Provincial Bureau of Quality and Technical Supervision in the testing institutions that meet the qualification requirements.